Herbal medicine is an integral part of Chinese medicine, and Chinese medicine extract is the main way of herbal medicine application. Therefore, the extraction operation of Chinese medicine is an important unit operation in the production process of Chinese medicine. With the modernization of Chinese medicine, traditional Chinese medicine extraction equipment can not fully meet the needs of the development of Chinese medicine. Energy saving and emission reduction technology, integrated manufacturing technology, on-line monitoring technology and intelligent digitization are the main research directions of intelligent production of Chinese medicine. This paper studies the on-line quality monitoring and intelligent control system of Chinese medicine extraction process. Near infrared spectroscopy has the unique advantage of rapid analysis, which makes it play an important role in the development of rapid analysis and detection methods for Chinese medicine production process. Near infrared spectroscopy analysis platform includes field level, edge level and cloud computing level. Its core content is the design of near infrared analysis method for online monitoring. The main parts are extraction equipment, online sample pretreatment subsystem, online near-infrared spectrometer subsystem, online near-infrared spectrum quality analysis and intelligent control system main control subsystem, extraction workshop automatic control subsystem. On-line detection technology detects the key quality of raw materials, intermediate products and process in real time through process analysis instruments directly installed on the production line. This technology can feedback in real time to design, analyze and control the production process, which can better guide the production, reduce the batch difference of intermediates, ensure the stability of drug quality, and provide real-time production data for subsequent product quality backtracking.

In order to realize the intelligent extraction of Chinese medicine production enterprises, the old equipment can be transformed. The method of transformation is to use camera technology to obtain data. In view of the situation that the collected images are not clear enough, this paper establishes a step-by-step correction method for photographic images. In the field of visual inspection, cameras are used to collect images, and the images taken are photographic images. The photographic images may be distorted so that the parallel lines on the object become non-parallel lines in the captured image. In order to restore the true shape of the object, the image needs to be corrected. Image processing system includes image capture module, image recognition module and image correction module. Image correction first performs parallel line intersection calculation and then performs image step-by-step correction. Image step-by-step correction includes affine correction, similarity correction and metric correction. This paper summarizes the computer running logic of each correction module through experiments. The corrected camera image enters the monitoring system of traditional Chinese medicine extraction, which makes the detection of traditional Chinese medicine extraction more timely, comprehensive and effective. The successful application of step-by-step correction software for photographic images has broken through the technical bottleneck of traditional Chinese medicine extraction equipment, realized real-time and effective monitoring of key indicators in the production process of traditional Chinese medicine extraction, and formed an advanced and effective quality control system for the production process of traditional Chinese medicine extraction.Stepwise image correction technology can also be applied to process monitoring in other industries to achieve intelligent production management.

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