2results 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.

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.