3results about How to "Not affected by accuracy" patented technology

The utility model provides a confocal microscopic Raman spectrometer wave number correction device, and belongs to the technical field of Raman spectrum detection. The correction device comprises a laser used for emitting laser; the lens assembly comprises a plurality of lenses, and the lens assembly is used for collimating and focusing the laser; the reflector assembly comprises a plurality of reflectors, the plurality of lenses and the plurality of reflectors are alternately arranged, and the reflector assembly is used for adjusting the light path direction of the laser; the attenuation sheet is arranged on a reflection light path in the reflector assembly and is used for attenuating the energy of the laser; the slit is arranged at a confocal position in the lens assembly, and the slit is used for screening Rayleigh scattering light in the attenuated laser; wherein the reflector assembly reflects the Rayleigh scattering light to the rotating grating assembly in the spectrometer. The correction device realizes a convenient and fast calibration process, and improves the calibration precision.

This invention discloses a liquid engine ignition device and method. The liquid engine ignition device includes a storage tank, an ignition tube, an exhaust check valve, and a shaped shuttle valve. The storage tank contains a storage tank piston, dividing the tank cavity into a storage chamber and a storage gas chamber. The ignition tube contains an ignition tube piston, dividing the ignition tube cavity into a tube body storage chamber and a compression gas chamber. The tube body storage chamber can hold the ignition propellant required for each ignition. The inlet of the tube body storage chamber is connected to the storage tank cavity, and the outlet is connected to the combustion chamber. During ignition, the shaped shuttle valve connects the compression gas source to the compression gas chamber, pushing the ignition tube piston to move and extruding the ignition propellant from the tube body storage chamber into the combustion chamber. In the non-ignition state, the compression gas chamber is connected to the storage tank cavity, pushing the storage tank piston to move and filling the tube body storage chamber with the ignition propellant from the storage tank cavity. This invention provides an engine ignition device that can automatically fill the ignition propellant and achieve multiple ignitions, and has a simple structure and good stability.

This application relates to a method, computer device, storage medium, and program product for creating a location fingerprint database. In response to a location fingerprint database creation command for a digital key, it outputs creation guidance information for the location fingerprint database. When it is determined that the reference device associated with the vehicle and the digital key are carried by the same object, it acquires signal strength characteristic data of the digital key at each sampling point within a sampling area. Based on the signal interaction information between the reference device at each sampling point and a first signal receiver on the vehicle, it determines the location information of each sampling point. Based on the signal strength characteristic data and location information of each sampling point, it manages the location fingerprint database of the digital key. In the application stage of the location fingerprint database, vehicle control based on the digital key no longer depends on the positioning accuracy of the digital key itself, improving the accuracy of vehicle control; and outputting creation guidance information to the user also improves the accuracy of vehicle control.