61results about How to "Improve sex-to-noise ratio" patented technology

The invention provides a friction nano-generator, which comprises a first power generation layer, a second power generation layer and a packaging layer, wherein the first power generation layer comprises a first substrate material layer, a first electrode layer arranged on a first surface of the first substrate material layer and a first polymer nanostructure layer arranged on a second surface ofthe first substrate material layer; the second power generation layer comprises a second substrate material layer, a second polymer nanostructure layer arranged on a first surface of the second substrate material layer and a second electrode layer arranged on the second polymer nanostructure layer, and the second electrode layer and the first polymer nanostructure layer are arranged in a face-to-face manner; and the packaging layer is used for packaging the first power generation layer and the second power generation layer. The invention further provides a micro-mechanics sensor based on the friction nano-generator and a sensing system comprising a plurality of micro-mechanics sensors. The micro-mechanics sensor provided by the invention can detect weak mechanical signals in a real time and high precision manner, and realizes wearable applications.

The invention relates to a multi-grating programmable panchromatic spectrometer aiming at monitoring the safety of foodstuff, comprising a light source, a sample pool, a detection part, dispersing components, an imaging device, a programmable spatial light modulator area array and a plurality of detectors aiming at different wavebands, wherein, light emitted by the light source passes through thesample pool and is reflected to the dispersing components; the light with different wavelengths is reflected to the programmable spatial light modulator area array by various dispersing components with different parameters; the programmable spatial light modulator area array is modulated through exertion of slaving voltage, and then a plurality of subsequently arranged single detectors respectively obtain the optical intensity of various wavelengths or the synthetic optical intensity of light with a plurality of wavelengths in turn according to the time sequence; finally, monitoring of spectra is realized by utilization of the digital conversion method. The dispersing components of the instrument adopt gratings or commercial compact discs and so on; the programmable spatial light modulator area array is a spatial light modulator area array based on MOMES technology; photoelectric detecting parts are a plurality of detectors aiming at different wavebands. The multi-grating programmablepanchromatic spectrometer has the advantages of low cost, small volume, quick response speed, portable use, capability of realizing full spectrum detection and so on.

The invention discloses a preparation method for a silicon germanium (SiGe) monitoring chip. The preparation method comprises the following steps of: 1) at least designing a group of raster graphics; 2) defining the raster graphics designed by the step 1) on a substrate, and etching the substrate to form a raster graphics consisting of a plurality of regularly arranged trenches; 3) depositing a SiGe thin film with specific content on the substrate to form the SiGe thin film with the raster graphics; and 4) preserving a photoresist on middle parts at the bottoms of the trenches of the raster graphics of the SiGe thin film to form a photoresist raster graphics. The SiGe monitoring chip prepared by the method is highly sensitive to optical characteristic changes caused by lattice mismatching in pre-bake, and the changes of a pre-bake process can be accurately and conveniently monitored. The invention also discloses a monitoring method for the SiGe thin film.