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Introduction to the classification of position detectors for packaging steel strip rolling parts
by：Hongmei
2021-03-15
Introduction to the classification of position detectors for packaging steel strip rolling parts
The rolling piece position detector has the following types:
(1) Hot metal detector HMD. When the hot-rolled product reaches the position of the detector, the infrared radiated by the hot-rolled product is focused by the objective lens, and through a filter that cuts off visible light, the person hits the photoelectric conversion element (silicon solar cell, etc.) placed at the focal point for photoelectric conversion. The output of the photoelectric conversion element is amplified by a DC amplifier and used as a control signal. The influence of rolling stock temperature or water vapor should be considered during use.
(2) Gamma ray detector. Used in heating furnace and rough rolling process rolling piece or plate edge detection. The gamma-ray source and gamma-ray detector are respectively placed on both sides of the plate. When the steel plate arrives, the signal from the detector changes sharply, and this signal is amplified as a control signal. The work of the γ-ray edge detector is not affected by changes in the temperature of the rolling stock and water vapor.
(3) Cold metal detector CMD. The light emitted by the illuminator or laser source that is frequency-converted by the oscillation circuit is received by the light receiver and becomes the output voltage of the phototransistor, and then becomes the output signal after amplification and detection. When the head of the plate reaches or the tail leaves the position of the detector, due to the radiation, reflection or shading of the plate, the amount of light received by the light receiver changes, causing the output signal to change, so that the edge position of the plate can be detected.
The rolling piece position detector has the following types:
(1) Hot metal detector HMD. When the hot-rolled product reaches the position of the detector, the infrared radiated by the hot-rolled product is focused by the objective lens, and through a filter that cuts off visible light, the person hits the photoelectric conversion element (silicon solar cell, etc.) placed at the focal point for photoelectric conversion. The output of the photoelectric conversion element is amplified by a DC amplifier and used as a control signal. The influence of rolling stock temperature or water vapor should be considered during use.
(2) Gamma ray detector. Used in heating furnace and rough rolling process rolling piece or plate edge detection. The gamma-ray source and gamma-ray detector are respectively placed on both sides of the plate. When the steel plate arrives, the signal from the detector changes sharply, and this signal is amplified as a control signal. The work of the γ-ray edge detector is not affected by changes in the temperature of the rolling stock and water vapor.
(3) Cold metal detector CMD. The light emitted by the illuminator or laser source that is frequency-converted by the oscillation circuit is received by the light receiver and becomes the output voltage of the phototransistor, and then becomes the output signal after amplification and detection. When the head of the plate reaches or the tail leaves the position of the detector, due to the radiation, reflection or shading of the plate, the amount of light received by the light receiver changes, causing the output signal to change, so that the edge position of the plate can be detected.
