7results about How to "The test results are consistent" patented technology

The invention discloses an intelligent detection system and method for coating color flaws and defects, and the method comprises the steps: selecting a standard sample, and creating a color code model based on a machine vision system; stacking and feeding, and conveying to a visual inspection station one by one; coating image information of all products in each tray is sequentially collected based on a machine vision detection system; feature parameters in the image information are extracted, and color flaws and defects of each to-be-detected product in each tray are compared and judged according to a color code model; marking unqualified products, and outputting a judgment result; and stacking and blanking. According to the invention, accurate quantification of coating colors of industrial products is realized, the defect of subjective judgment of human eyes is avoided, the detection efficiency and the defect identification precision are high, the manual dependence is reduced, the operation is convenient, mass production and full detection can be realized, and the pain point that manual detection and spectrograph detection cannot adapt to mass production is solved; and all microscope base product detection data in the corresponding charging tray can be called by identifying the identity information of the charging tray through the two-dimensional code, so that whole-course traceability is realized.

This application discloses a parameter acquisition method for an oscillation waveform detection system, relating to the field of power system control technology. By accurately acquiring parameters such as the equivalent inductance, capacitance, resistance, and minimum test voltage of the transformer winding under test, as well as the maximum and minimum oscillation frequencies of the oscillation waveform detection system, the lower limit of the input impedance of the waveform acquisition module, the upper limit of the range, the upper limit of the output voltage amplitude of the DC power supply, and the maximum allowable output current, the method obtains the equivalent total capacitance of the oscillation waveform detection system, the series capacitance of the upper and lower arms of the voltage divider, the first capacitance of the waveform adjustment capacitor, the second and third capacitances of the upper and lower arms of the voltage divider, and the resistance of the current-limiting resistor. This avoids uncertainties arising from empirical design, ensures the stable and controllable quality of the generated oscillation waveform, and guarantees consistent and reliable detection results on transformers of different capacities and voltage levels.

The invention provides a novel combined marker for multi-target esophageal cancer detection and application thereof. A series of novel methylation sites capable of efficiently distinguishing esophageal cancer and esophagitis patients are found from high-depth whole genome methylation (WGBS) sequencing of cfDNA samples of esophageal cancer tissues, para-carcinoma tissues and normal people and targeted methylation sequencing data of cfDNA samples of esophageal cancer patients, normal people and benign disease patients; the kit can be used for efficient detection of esophageal cancer; the novel gene methylation site is combined with other esophageal cancer protein detection markers (such as CA199, CEA and SCCA), the AUC value can be further increased, and the sensitivity and specificity of esophageal cancer screening are improved.

The application discloses a kind of self-adapting pulse eddy current corrosion defect detection method and detection device, belong to electromagnetic nondestructive testing technical field.The method includes: respectively collecting air domain and the pulse eddy current signal of measured piece, and difference signal is constructed after filtering and logarithmic transformation;Based on the peak time of the difference signal, the slope ratio of rising and falling section and the initial change time difference, the best fitting interval of late slope is adaptively determined;Linear fitting is carried out to the measured piece signal in the interval, and the late slope characteristic value is extracted;Using the known thickness of calibration position and corresponding slope, the residual wall thickness of measured position is calculated by formula, and the quantitative evaluation of corrosion defect is realized.The application overcomes the problem that fitting interval depends on fixed threshold in prior art, and the adaptability is poor, can automatically adapt to different detection conditions, significantly improves the stability of feature extraction and the reliability of detection result, especially suitable for online corrosion detection of ferromagnetic component with cladding layer.

The invention relates to the technical field of image enhancement, and provides a food impurity detection method based on a spectrum technology, which comprises the following steps: acquiring spectrum image data and built-in reference plate data on line, and normalizing original data through real-time self-calibration to form standard spectrum characterization; performing motion and illumination disturbance compensation on the standard spectrum characterization, and establishing a material spectrum fingerprint database containing material category and source information based on the collected standard spectrums of the impurity material and the contact part material; performing rapid screening and connected domain extraction on the compensated spectral representation to obtain a candidate region, calculating the similarity and the novelty of the candidate region and the fingerprint database, and triggering local reinspection when the similarity falls into an uncertain interval or the novelty exceeds a preset threshold value to determine the category and the position of an impurity; and outputting a multi-dimensional detection result, and performing controlled updating and version management on the fingerprint database and the candidate screening threshold value based on a confirmation sample.

This invention belongs to the field of food safety testing technology. It discloses a high-standard testing method and apparatus for water quality grading in food processing. The method involves acquiring macro images of water samples using an industrial camera and a ring-shaped shadowless light source. Multi-scale Retinex enhancement processing is employed to eliminate the influence of uneven lighting. A lightweight MobileSAM network is used to accurately segment four types of abnormal regions: turbidity, suspended solids, abnormal color, and biofilm. Subsequently, features are extracted along three parallel channels: color, texture, and frequency domain. After standardization and decorrelation processing, an 18-dimensional abnormal feature vector is constructed. Based on the Fisher discriminant criterion, the optimal projection direction and dynamic grading threshold are determined. Finally, the water quality anomaly level is output through area-weighted comprehensive evaluation. This invention achieves objectivity and standardization of the testing process, possesses accurate identification capabilities for various water quality anomalies, and features an adaptive grading mechanism and intelligent comprehensive evaluation function, effectively identifying potential risks and providing early warnings.

The invention relates to the technical field of leak detector detection limit calibration, in particular to a sulfur hexafluoride leak detector detection limit calibration device and method. The system comprises a gas distribution unit used for providing high-purity sulfur hexafluoride gas and working condition gas; the pressure container is provided with a gas inlet, a gas outlet and a standard leak hole, and the standard leak hole is used for generating sulfur hexafluoride gas with a known leak rate under a set pressure; and the gas distribution unit is connected with the gas inlet of the pressure container. The gas distribution unit is characterized in that a first switch valve is arranged on a high-purity sulfur hexafluoride gas bottle; a second switch valve is arranged on the working condition gas bottle, and the high-purity sulfur hexafluoride gas and the working condition gas are converged into the gas inlet through the first switch valve and the second switch valve respectively. According to the invention, accurate calibration of the detection limit of the sulfur hexafluoride leak detector can be realized in application scenarios under working conditions of different pressures and different sulfur hexafluoride concentrations, and it is ensured that the test result of the leak detector is consistent with the leakage condition under the actual working condition.