7results about How to "Avoid detection interference" patented technology

This invention discloses a crankshaft axis inspection instrument based on machine vision, belonging to the field of crankshaft inspection technology. The machine vision-based crankshaft axis inspection instrument includes an inspection table and a primary lead screw slide mounted on the inspection table. A primary slide is slidably mounted on the primary lead screw slide, and a mounting frame is fixed on the primary slide. A vision camera for visually inspecting the crankshaft axis is mounted on the mounting frame. A support frame is vertically fixed on the mounting frame, and an illumination component coaxial with the vision camera is mounted on the support frame. Two sets of follow-up support wheels are provided below the crankshaft main journal to prevent deformation due to their own weight. A base component is provided on the support frame to adjust the position and angle of the follow-up support wheels. A base is mounted on the base component, and an adaptive support sensing component is provided on the base to sense the pressure of the follow-up support wheels supported below the crankshaft main journal. This inspection instrument can support and limit the crankshaft main journal, reduce axis inspection interference, and improve the accuracy of visual inspection.

The present invention belongs to the field of analysis and detection, and specifically relates to a method for simultaneously detecting residual organic solvents of N,N-dimethylformamide and sulfolane in amifostine by gas chromatography, which includes sample pretreatment and gas chromatograph detection method, and the steps are as follows: take amifostine, first add water to completely dissolve it, then add an organic solvent to filter after amifostine is precipitated, and take the filtrate and directly enter the gas chromatograph according to the gas chromatography detection conditions. The sample pretreatment method of the present invention can not only completely dissolve the DMF and sulfolane wrapped in the amifostine sample, but also remove the high-boiling point amifostine and directly enter the gas chromatograph, avoiding the contamination of the gas chromatograph and the detection interference caused by the degradation impurities of amifostine. The gas chromatograph detection method provided by the present invention can simultaneously and accurately detect the content of residual organic solvents of N,N-dimethylformamide and sulfolane in amifostine.

The present invention discloses a battery charging control method, in which a single chip microcomputer as a controller is used to control the battery charging. After the battery charging reaches a preset cycle time, the charging circuit is disconnected to allow the battery voltage to return to the actual voltage. After the battery voltage drops and stabilizes, the voltage is detected again, thereby avoiding detection interference caused by the charging voltage. Compared with the existing method for charging the battery by a charging device, the charging effect of the scheme is better, and the battery overcharge phenomenon will not occur. When the battery is fully charged, the battery voltage is closer to the full-charge voltage of the rechargeable battery, that is, the rated voltage, thereby improving the battery performance and increasing the battery life. Moreover, the scheme selects a single chip microcomputer as a controller to control charging, thereby reducing the cost.

The application relates to a detection reagent for detecting escherichia coli and a preparation method, and belongs to the technical field of food safety detection. The detection reagent is a graphene-loaded targeted copper-chlorine co-doped carbon nanometer enzyme aptamer compound, is a light brown transparent liquid, and is prepared by reacting magnetic graphene, (3-dimethylaminopropyl)-3-ethyl carbodiimide, N-hydroxysuccinimide, copper-chlorine co-doped carbon nanometer enzyme and amino-modified aptamer according to a molar mass ratio of 15g:3mol:1.5mol:262.5g:0.3mol. The application carries out cascade signal amplification based on the targeted copper-chlorine co-doped carbon nanometer enzyme with high signal output and the reverse magnetic attraction strategy; when the to-be-detected substance contains escherichia coli O157:H7, the targeted copper-chlorine co-doped carbon nanometer enzyme on the magnetic carrier can specifically recognize the target strain to form a composite structure, the interference of the magnetic carrier on the signal output is eliminated through the reverse magnetic selection effect, the supernatant is taken to measure the fluorescence intensity at 456nm and the ultraviolet absorption intensity at 654nm to determine the concentration of the escherichia coli O157:H7.

The present invention discloses a method for detecting the vitrinite reflectance of coal, which mainly solves the technical problems in the prior art that the detection accuracy of the vitrinite reflectance of coal is low, it depends on the experience of the inspector, and the vitrinite reflectance of coal with a particle size of less than 0.2 mm cannot be detected. The technical scheme is a method for detecting the vitrinite reflectance of coal, comprising the following steps: 1) preparing a coal sample to be tested; 2) performing dry distillation on the coal to be tested, weighing a certain mass of the coal sample to be tested, loading it into a high-temperature furnace, controlling the high-temperature furnace to heat the coal sample to be tested from room temperature to the dry distillation temperature of the coal at a heating rate of 3 to 10°C / min, using a hydrogen analyzer to measure the volume of hydrogen generated in the whole process of heating the coal sample to be tested from room temperature to the dry distillation temperature of the coal, and calculating the hydrogen generation index n of the coal to be tested, in units of ml / mg; 3) calculating the vitrinite reflectance of coal. The method of the present invention detects the vitrinite reflectance of coal quickly and accurately, and is not affected by the particle size of the coal.

The invention relates to the technical field of flatness detection, and discloses a surface flatness detection device and method for amorphous alloy strip production, the surface flatness detection device is used for performing visual detection on the surface flatness of an amorphous alloy strip, and the surface flatness detection device comprises a device body; the first detection units are used for carrying out pre-detection treatment on the flatness of the upper surface and the lower surface of the amorphous alloy strip; and the second detection unit comprises a first flatness visual detector and a second flatness visual detector which are arranged on the upper side and the lower side of the amorphous alloy strip. The first detection unit is arranged to perform pre-detection treatment on the flatness of the surface of the amorphous alloy strip, physical pre-positioning is performed on the uneven position on the amorphous alloy strip, and local key detection is performed on the positioning position through the first flatness visual detector and the second flatness visual detector. Therefore, detection interference caused by light reflection is avoided.

The invention relates to the technical field of respiratory protection equipment, in particular to a respiratory protection equipment suitability test system and method.The respiratory protection equipment suitability test system comprises a respiratory protection hood, an aerosol generation module, a particulate matter monitoring module and a control module, and a closed protection space matched with the head of the human body is formed in the respiratory protection hood; the respiratory protection hood is provided with a neck sealing piece and a gas connecting ring; a gas outlet of the aerosol generating module is communicated with the gas connecting ring through a gas guide pipe; the particulate matter monitoring module is used for collecting the particulate matter concentration inside and outside the closed protection space; and the control module is used for receiving the particulate matter concentration and calculating a suitability test result according to the particulate matter concentration. According to the respiratory protection equipment suitability test system, through the standardized process and accurate monitoring, the close suitability degree of the equipment and a wearer is judged, the respiratory safety of an operator is guaranteed, and standardization and accuracy of the detection process are achieved.