Near-infrared vision sensing detection device for large-scale high-temperature forgeable piece

Abstract

The invention relates to a near-infrared vision sensing detection device for a large-scale high-temperature forgeable piece. The detection device comprises a million pixel camera (1), a camera stand (8) and a USB (Universal Serial Bus) data line (9) and is characterized in that a near-infrared light filtering system (7) consists of a high-pass light filter (2), an optical glass sheet (3), a fixedbarrel (4) and a lens barrel (5) and is coaxially connected with a near-infrared digital CMOS (Complementary Metal-Oxide-Semiconductor Transistor) video camera (6) provided with the million pixel camera (1) and the camera stand (8); both the near-infrared light filtering system (7) and the near-infrared digital CMOS video camera (6) are sealed in a shielding box (11), and a light blocking structure part (13) is arranged outside the shielding box; and the digital CMOS video camera (6) is connected with a visual information processing controller (10) through the USB data line (9). The near-infrared vision sensing detection device has remarkable advantages of obtaining images at a high speed, resisting defocusing and the like compared with a CCD (Charge Coupled Device), has high cost performance and is widely suitable for accurately measuring the intermittent and continuous sensing of the external dimension and the temperature of large-diameter shaft and gear workpieces during the forging and heating process.

Description

technical field [0001] The invention relates to a non-contact visual detection device for large-scale forgings, in particular to a near-infrared sensing detection device for large-scale high-temperature forgings. Background technique [0002] For existing high-temperature forgings, the visual method is generally used to estimate the size and deformation of the workpiece, but the misjudgment rate of this method is very high. The use of infrared thermometers to detect the temperature of workpieces is widely used in research and application, but the cost of infrared thermometers is very high, and the size of heated workpieces cannot be measured, which limits its promotion. In recent years, there have been studies on the use of low-cost CCD sensors to detect the dimensions of forgings. Zheng Luyao et al. published "Integrated measurement and control of large forgings based on non-contact measurement" in "China Test" magazine, Volume 35, No. 1, January 2009. According to the art...

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Problems solved by technology

[0002] For the existing high-temperature forgings, the visual method is generally used to estimate the size of the workpiece and the amount of deformation, but the misjudgment rate of this method is very high

The use of infrared thermometers to detect the temperature of workpieces is widely used in research and application, but the cost of infrared thermometers is very high, and the size of heated workpieces cannot be measured, which limits its promotion.

In recent years, there have been researches on the use of low-cost CCD sensors to detect the dimensions of forgings. Zheng Luyao et al. published "Integrated measurement and control of large forgings based on non-contact measurement" in "China Test" magazine, Volume 35, No. 1, January 2009. According to the article "Program of Chemical Technology", the program stated that using visible light to measure the external dimensions of forgings can achieve better results, but because visible light cannot reflect the temperature information of large forgings, it cannot measure the temperature of high-temperature forgings

So far, the problems of how to use the thermal radiation of high-temperature forgings to detect the external dimensions of workpieces, detect the temperature of workpieces, and detect the dimensions and temperature changes of workpieces in the free forging process have not been solved; The sensing and detection of the forging temperature can only work alone, including the control method for the overall quality of the forging has not been solved

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