Packaging steel strip rolled piece position detector classified summary

Packaging steel strip rolled piece position detector introduction of classification of rolled piece position detector has the following kinds: ( 1) Hot metal detector HMD. When reach the detector position rolling, rolling radiation of infrared light by the objective lens focus, through the interrupt of visible light filters, who shot to focus on location of the photoelectric conversion element ( Silicon solar cells, etc. ) The photoelectric conversion. The output of the photoelectric conversion element by dc amplifier amplification, used as a control signal. In the rolled piece should be considered when using the influence of temperature and water vapor. ( 2) γ Ray detector. Used for heating furnace and roughing mill or edge detection. γ Ray source and & gamma; Ray detector respectively mounted on board, the left and right sides of the plate arrived, rapid changes in signal from the detector, the signal amplification, as a control signal. Ray edge detector work is not affected by the impact of the rolled piece temperature change and water vapor. ( 3) Cold metal detector CMD. By the oscillation circuit of inverter illuminator or laser source light accept by by light, into the output voltage of the photosensitive transistor, amplification, detection, and then into the output signal. When plate arrive head or the tail left the detector position, due to the radiation, reflection, or shading plate, the light of the light changes, causes the output signal changes, which can detect the edge position.