3results 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 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 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.