The thermal metal detector is mainly used in the metallurgical industry system. Its working principle is that the infrared radiation of the thermal parts is focused by the lens and absorbed by the photoelectric device. The photosensitive device converts the optical signal into electrical signal, which is processed by the controller and outputs a switching signal to the control mechanism to achieve the purpose of automatic control.  

   When the ambient temperature is high, the fiber split hot metal detector should be used.  The optical fiber is connected to the lens and controller of the thermal detection. The high-temperature resistant lens is close to the thermal parts to be detected, and the infrared radiation of the thermal parts is focused and absorbed by the lens. After the operation of the microcontroller far away from the heat source, when the energy exceeds a certain set value, the detector will have the corresponding signal output.  

   In practical work, looper control method is mainly used to improve the production quality of steel rolling, and effective speed regulation of steel rolling equipment is also needed when necessary.  Micro tension control method to promote the smooth operation of automatic process, make full use of looper to material tracking, production process monitoring, to drive the implementation of the law to promote steel rolling production, master the micro tension control function.  At the same time, the looper scanner is used to accurately locate and detect the head, tail, edge and middle position of hot metal, and scientifically control the production speed of steel rolling.