57results about How to "Detection Technology Improvement" patented technology

An optical waveguide bio-sensing device, comprising: a monochromatic light source, a beam splitter, a grating chip with a sub-wavelength grating structure and a sensor. Moreover, in order to enhance the sensitivity of the system using the optical waveguide bio-sensing device, a light concentrating element or a quarter waveplate (¼λ) is arranged in the optical path during detection. When the grating chip is not coated with a layer of biochemical substance corresponding to a monochrome light emitted from the monochromatic light source, a reflected light of a specific narrow wavelength is reflected by a specific angle as a surface plasmon resonant effect caused by waveguide coupling is excited by the incidence of the monochrome light to the grating chip through the beam splitter; otherwise, there will be little or no reflection. Accordingly, the optical waveguide bio-sensing device can detect bio-molecular interactions, reaction rate and / or molecular dynamics without any labeling in real time. Optical systems using the present invention are simplified and capable of being portable. Thus a high sensitivity detection technique is achieved.

The invention discloses an elasticity test tool for taper washers. The elasticity test tool for taper washers comprises an inner cone with an inner conical surface, and an outer cone with an outer conical surface, wherein the inner cone and the outer cone are opposite in the vertical direction. The conical surfaces of the inner and outer cones match with each other while the inner and outer cones have superposing axes. The inner and outer conical surfaces are provided with set taper angles equal to a taper angle of a taper washer to be tested. The inner and outer conical surfaces are peripherally provided with upper and lower positioning planes facing to each other respectively. The upper and lower positioning planes are perpendicular to the axes. A block for limiting the distance between the inner and outer conical surfaces is disposed between the upper and lower positioning planes. The vertical thickness of the block is L+(S+0.12)*sin(alpha / 2), the alpha is the taper angle of the taper washer to be tested, the S is the thickness of the taper washer to be tested, and the L is spacing of the upper and lower positioning planes when the inner and outer conical surfaces are fitted. When the upper and lower positioning planes contact with the upper and lower ends of the block respectively during test, the taper washer can be exactly compressed to be S+0.12mm high.

The invention provides a laser Raman detection method of malachite green, which comprises the following steps: preparing a reinforced chip: dropwisely adding a nano silver colloid water solution onto an aluminum foil, and after finishing the dropwise addition, drying to obtain the reinforced chip; dropwisely adding a sample extracting solution to be detected onto the reinforced chip, and airing to obtain a sampling point of the sample to be detected; and carrying out Raman spectrum scanning on the sampling point of the sample to be detected by using a laser Raman spectrograph, and carrying out qualitative detection on the sample to be detected according to the standard Raman spectrum of malachite green. The method is high in sensitivity, and is a convenient, quick and practical detection technique.