Ladle is a container which used to connect the steel-making and pouring sections.The tapping temperature of the steel-making furnace is directly determined by the temperature of the inner wall of the ladle

which is closely related to the energy saving and consumption Reduction of the enterprise.Before the ladle is filled with molten steel

the ladle is placed in the hot repair station by driving.The absolute position of the ladle after placement is difficult to fix

resulting in a temperature field distribution that cannot be determined.So

this article presents a method for measuring the temperature field of ladle by laser positioning and scanning.Firstly

the positioning laser is used to determine the spatial coordinates of the ladle.Then

the actuator of the main measurement platform drives the scanning laser and the infrared temperature measurement sensor to scan the inner wall surface of the ladle to obtain the distance measurement and temperature of each measured point on the inner wall of the ladle.According to the spatial coordinate relationship

the distance measurement values of the measured are mapped to the ladle coordinate values

therefore we obtained the coordinates and temperature values of the inner wall of the ladle.So the temperature field distribution is obtained.The field experiment shows that the method can obtain the temperature field of the ladle

the coordinate positioning uncertainty is no more than 3.0mm;the maximum error of temperature measurement is 4.7℃

the minimum error is 0.5℃

and the average error is less than 3.3℃.The method achieves to high positioning and measurement accuracy

it will provide important information for steel-making control based on temperature information.