41results about How to "Test results are reliable" patented technology

The invention provides an acute toxicity algae infrared testing method of toxic and harmful substances, which adopts the sensitive algae liquid with the chlorophyll content not less than 4.0mg.L-1 and the toxicity test factors of a portable infrared thermometer. The contrast toxicity test is carried out by selecting the processing and concentration design of a test sample, the response dose and the minimum response concentration of the sensitive algae to the sample are determined by the sample dilution concentration and the adding amount of a first-appeared temperature response during the dilution concentration test of using different samples for response temperature difference and response time so as to determine the toxicity of the sample. The sensitivity of the method of the invention can achieve the sensitivity of a luminous bacteria method, the average testing time of the method and the average testing time of the luminous bacteria method are similar, the testing effect ofthe acute toxicity algae infrared testing method of the toxic and harmful substances is the same with the testing effect of the luminous bacteria method. The invention is characterized by convenient test, low cost, strong specificity, field test and so on.

The invention provides an online detection method for hot mill roller rolling direction offset, and belongs to the technical field of hot mill roller detection methods. The online detection method is used for accurately measuring the offset, in the rolling direction and relative to a housing, of a roller. According to the technical scheme, the hot mill housing serves as a reference object, the light intensity center of a light-permeable circular hole which is fixed relative to the housing serves as the feature point of the position of the housing, in the rolling process, an image of the feature point of the position of the housing is obtained through a CCD camera which is fixed relative to the roller, the real-time physical coordinates of the center of the feature point of the housing is calculated by comparing the image with the calibrated distance, and therefore the offset, relative to the housing and in the rolling direction, of the roller is obtained. The method is simple, practical and accurate and reliable in test result, provides reliable offset correction data for accurate control over the adjustment and the plate shape of a roller system, and has important significance in the increase of the steel plate yield. The method solves the difficult problem that the offset, in the rolling direction, of the roller can not be accurately measured and has extremely-high popularization and use value, wherein the problem has affected production for a long time.