3results about How to "Simple detection structure" patented technology

The application discloses a detection system and method with an anti-vibration and sensitivity-enhanced gas photoacoustic in-situ detection mechanism, which comprises an excitation light source and a collimating assembly, a photoacoustic cell and a signal processing unit. The laser emitted by the excitation light source and the collimating assembly is arranged along the central axis of the photoacoustic cell. A plurality of groups of microphones are arranged on the central section of the photoacoustic cell. Each group of microphones comprises two microphones symmetrically arranged on the left and right sides or the upper and lower sides of the central section of the photoacoustic cell. The signal processing unit receives the signals of each microphone, processes the signals, and the central section of the photoacoustic cell is a section perpendicular to the axial direction of the photoacoustic cell and located in the middle of the photoacoustic cell. The excitation light source and the collimating assembly emit laser, the signal processing unit collects and processes the signals of the plurality of groups of microphones, and the concentration of the dissolved gas in the oil circuit is obtained according to the corresponding matching relationship between the signal processing result of the signal processing unit and the gas concentration.

This invention discloses an internal inspection device, system, and method for pipeline defects in ferromagnetic fluid pipelines, particularly relating to the field of defect detection. The method includes: a fixed assembly, multiple permanent magnet assemblies, and multiple arrayed ferromagnetic conductor detection assemblies. The permanent magnet assemblies are uniformly arranged circumferentially on the outer wall of the fixed assembly, with the south pole of each permanent magnet assembly facing the fixed assembly. The arrayed ferromagnetic conductor detection assemblies are installed at the north pole of each permanent magnet assembly. Each arrayed ferromagnetic conductor detection assembly includes multiple ferromagnetic fluid detection units, each ferromagnetic fluid detection unit comprising an upper electrode plate, a ferromagnetic fluid pore, and a lower electrode plate. The ferromagnetic fluid pore is positioned between the upper and lower electrode plates and is sealed and filled with ferromagnetic fluid. This invention can improve the accuracy of pipeline defect detection.

The application provides a nucleic acid detection card box and a nucleic acid detection method, which comprise sample cavities, pipetting cavities and reagent cavities arranged at intervals along the length direction of the box body; a reaction tube provided with a reaction cavity; a control valve accommodated in a valve cavity and provided with a plurality of independent pipetting flow channels, the pipetting flow channels being used for connecting one of the sample cavities, the reagent cavities and the reaction cavity with the pipetting cavity; and a pipetting driving element arranged in the pipetting cavity and capable of ascending and descending in the pipetting cavity to form positive pressure or negative pressure in the pipetting cavity. The application integrates a plurality of pipetting flow channels in the control valve, simplifies the nucleic acid detection structure, does not need to arrange other flow channel structures, and can realize the change of the flow channel by driving the control valve to rotate, realizes the miniaturization of the nucleic acid detection card box, realizes liquid transfer and mixing by cooperating with the ascending and descending of the pipetting driving element, and can ensure that the nucleic acid detection card box always maintains a fully-closed detection state during the pipetting and mixing process.