2results about How to "Eliminate environmental problems" patented technology

The invention discloses an incident angle measurement method and system based on reflection light spot image analysis, and belongs to the technical field of optical measurement. The method comprises the following steps: enabling a laser beam to enter the front surface of a to-be-detected glass window at a preset reference incidence angle; collecting a light spot grayscale image of the reflected light beam, and obtaining an original grayscale image; determining a light spot connected domain according to the corrected image, and intercepting a local processing window by taking the center of the light spot connected domain as the center; obtaining an effective signal image after background removal according to the background estimation area at the periphery of the local processing window; constructing an exclusion mask, and determining an effective pixel set; on the effective pixel set, calculating the center coordinate of the light spot; and according to the displacement component, calculating a deviation value of a reference incident angle by combining geometric parameters of a measurement system, and obtaining an actual incident angle. According to the invention, excessive optical elements are not needed, sub-pixel-level center positioning is realized through cooperation of the image sensor and a high-robustness image processing algorithm, and the method has the advantages of high precision, strong anti-interference capability and simple structure.

This invention provides a biodegradable modified coating, a modified knot plugging agent for fracturing, and their preparation method, belonging to the field of tertiary oil recovery technology. Specifically, the dense cross-linked network structure generated by the Schiff base reaction between gelatin (GL) and glutaraldehyde (GD) serves as a coating material for the knot plugging agent, providing it with high strength and stability without sacrificing its biodegradability. Furthermore, by changing the reaction conditions (immersion time and curing time) during the preparation of the coated knot plugging agent, a series of knot plugging agents adaptable to different reservoir temperatures and degradation cycles can be obtained to meet the complex conditions in perforation cluster plugging processes, thus broadening its application range.