30results about How to "Insensitive" patented technology

The invention is a biometric system based on iris texture analysis, which overcomes the defects in the prior art that lack the support of iris image quality analysis mechanism and cannot complete the evaluation of iris texture image quality. The invention acquires iris texture images, automatically locates iris, evaluates and analyzes the quality of iris texture images, automatically tracks and detects living iris, standardizes polar coordinate transformation of iris analysis area, demodulates and expresses iris texture features, and generates feature code IrisID by quantization coding. Encoding IrisID similarity measurement, similarity measurement judgment and other steps are realized. The invention realizes the basic characteristic requirements of an ideal system: automaticity, non-invasiveness, friendly man-machine operation interface and high-quality imaging image; no correlation between geometric affine transformation and nonlinear affine deformation; no dependence on external imaging conditions ; Random probability distribution coding; High-precision false acceptance rate and false rejection rate performance.

A rotary position measuring system having a housing connected with a scanning unit having a light source that emits beams of light and a detector element. A reflection scanning graduation structure arranged directly on the housing opposite the scanning unit. A graduated disk is connected with a rotatable shaft and has a radial transmission measuring graduation structure, wherein the graduated disk is arranged so it is rotatable around an axis of symmetry in the housing so that the measuring graduation structure is located between the scanning unit and the scanning graduation structure. The beams of light emitted by the light source first reach the measuring graduation structure where they are split into a first set of diffracted partial beams of different orders and the diffracted partial beams impinge on the scanning graduation structure. A second set of diffracted partial beams of different orders results and a back-reflection of the second set of diffracted partial beams in the direction toward the measuring graduation structure results, where the second set of diffracted partial beams interfere with one another and the detection of interfering partial beams takes place by the detector element.

A two-component adhesive or sealant composition consists of a first component (K1) comprising a prepolymer P, which displays an isocyanate group, and an acceleration component (K2). The said acceleration component (K2) displays a catalyst, which catalyzes the reaction of isocyanate groups and which is a lead, zinc, or iron (III) complex, as well as compounds displayed on isocyanate-reactive groups that are at most 1% by weight. In particular, adhesives with a high cure velocity and good adhesion can be obtained and adapted very easily to ambient conditions.

A differential-pressure sensor system and a corresponding production method. The differential-pressure sensor system includes: a differential-pressure sensor chip having a first pressure application region for applying a first pressure, as pressure to be detected, to the differential-pressure sensor chip, and a second pressure application region for applying a second pressure, as reference pressure, to the differential-pressure sensor chip; a housing that partially surrounds the differential-pressure sensor chip; the housing having a through hole, through which the first pressure application region is exposed to the outside; and the housing having an input opening, through which the second pressure application region is exposed to the outside.

Precision movement of a table part by movement of a nut over a lead screw is achieved by a less rigorously precise structure than has heretofore been thought necessary. To that end the screw is fixedly supported only at one end and is rotatable in bearings mounted within a rigidly mounted tube which at least partially surrounds the screw, play in those bearings is minimized by exerting axial pressure thereon, the nut is especially designed to engage the screw only at separated points, thereby to reduce friction and play in the nut, and the nut is connected to the moveable table part by structure passing through an opening in the tube and resiliently engaging the moveable table part to compensate for displacement and play.

A two-freedom homodyne grating interferometer displacement measuring system based on the optical octave method comprises a grating interferometer, a measuring grating, pre-processing unit and an electric signal processing unit. The grating interferometer comprises a laser tube, a polarizing film, a polarization splitting prism, a reference grating, a refraction element and a four-passage homodyne structure. On the basis of optical grating diffraction, optical Doppler and homodyne signal processing, the system realizes displacement measurement. The grating interferometer outputs optical signals to the pre-processing unit. The optical signals are converted into electric signals and are transmitted to the electric signal processing unit. When the interferometer and the measuring grating are in two-freedom linear relative motion, the system can output two linear displacements. The measuring system realizes optical octave through the second diffraction principle, can realize sub-nanometer and even higher resolution. Homodyne signal treatment is adopted, so that the influence brought by changes of direct components and amplitudes can be eliminated. The two-freedom homodyne grating interferometer displacement measuring system has the advantages of being insensitive to environments, high in measuring precision and the like, and can improve the performance of a workpiece table when used as a lithography machine ultra-precise workpiece table displacement measuring system.

The invention discloses a controlling system for an IGBT type cascade speed control system active power filter. The controlling system for the IGBT type cascade speed control system active power filter comprises a mathematical model building unit, a linearization unit, a variable structure controlling unit and a controlling signal output unit, wherein the mathematical model building unit is used for building mathematical models of an inverter in a three-term stationary coordinate system and carrying out Park conversion to change the mathematical models into the mathematical models in a dq0 coordinate system; the linearization unit is used for carrying out accurate state feedback linearization on the mathematical models in the dq0 coordinate system; the variable structure controlling unit is used for designing the control law of inverter alternating current side current components in an index reaching law method, and a final system controlling input quantity is obtained; the controlling signal output unit is used for obtaining the driving controlling signals of the inverter after the input quantity is controlled by the system, and Park inverse transformation and sine pulse width modulation are conducted on the input quantity. The controlling system is simple in design and strong in robustness, when parameters of the system are disturbed internally or disturbed by external factors, the controlling system still can effectively restrain the non-power-frequency components, and the motor rotation speed adjusting effect is good.

The invention discloses a miniaturized insensitiveness detonating tube detonator. The miniaturized insensitiveness detonating tube detonator includes a detonating tube 1, a bayonet plug 2, a tube shell 3, a silk pad 4, ignition powder 5, a cover cap 6, an inner tube 7, intermediate powder 8, bottom powder 9 and a bottom cap 10. Boron/ nitrate of potash is pressed into the cover cap sticky with thesilk pad, and hexanitrostilbene is loaded into the inner tube and the bottom cap; the explosive hexanitrostilbene is adopted to replace initiating explosive, the combination structure of the cover cap, the inner tube and the bottom cap is used in a matched mode during powder loading, the axial size of the detonator is reduced, the radial constraint of the powder loading is strengthened, and the burning turning to detonation of the insensitive powder loading is effectively achieved; and the detonator is high in safety and simple in process structure, and can meet the miniaturization requirements of the detonation structure.

An electropneumatic proportional flow control device improves electropneumatic control of pneumatically operated valves. A single integrated valve incorporates a proportional valve component in operational and physical coordination with a pressure regulator valve component. The flow path of fluid is initially passed through the regulator component whereby pressure is regulated to within a manageable range for operation of a balanced type proportional valve component.

The invention discloses a remote sensing technology for evaluating the growth status of vegetation, and is used in the field of environment protection. The method flow of the remote sensing technologyis as follows: deriving and calculating ground radiation energy without contribution of direct solar radiation Bi(Tg_i<o>); calculating the middle infrared reflectivity rhob12 through Bi(Tg_i<o>); establishing a new vegetation index VI_M12 through rhob12 and the near infrared reflectivity rhoNIR; and evaluating the new vegetation index VI_M12. The method of the remote sensing technology is used to obtain the new vegetation index VI_M12, the vegetation index comprises the reflectivity of the near infrared band and the reflectivity of the middle-infrared band not sensitive to an aerosol, the characteristic that the NDVI (Normalized Differential Vegetation Index) is sensitive to the growth status of the vegetation is kept, the vegetation index also has the advantage that the vegetation indexis not sensitive to the aerosol; therefore, the obtained vegetation index is not sensitive to the weather like smoke dust, the growth status of the ground vegetation is also accurately observed, andthe vegetation index is of great significances for the regional or global problems in the fields of environment, hydrology, weather, zoology, forestry and the like.

The invention discloses a device and a method for measuring a thermal focal length of a laser medium, and belongs to the technical field of laser. The device comprises a rear end reflector, a to-be-measured laser medium, a cat eye module, an optical detector and a mounting frame for mounting the cat eye module and the optical detector; the distance between the focusing lens and a plano-convex lensin the cat eye group module can be adjusted; the optical detector is arranged on a focus of a convex surface of the plano-convex lens, critical points of a stable state and an unstable state of the laser are searched through the optical detector, and the thermal focal length of the to-be-measured laser medium is read on a stable area graph according to the distance between the focusing lens and the plano-convex lens. The device disclosed by the invention is suitable for laser media of an end pump and a side pump, the quick arrangement of the measurement device is realized by adopting an optical resonant cavity insensitive to the angle, the measurement of the thermal focal length of different laser media can be realized in a longer wavelength range, and the measurement can be easy to expand to the laser media of different wave bands.

A low-voltage-drop rectifier circuit includes a first MOSFET (Metal Oxide Semiconductor Field Effect Transistor), a second MOSFET, a comparator, and a level adjustment circuit. The first MOSFET has a gate terminal for receiving a control voltage, a source terminal connected to a connection node, a drain terminal connected to an input node, and a body terminal connected to the connection node. The second MOSFET has a gate terminal for receiving the control voltage, a source terminal connected to an output node, a drain terminal connected to the connection node, and a body terminal connected to the output node. The comparator generates a first comparison voltage and a second comparison voltage according to an input voltage at the input node and an output voltage at the output node. The level adjustment circuit generates and fine-tunes the control voltage according to the first comparison voltage and the second comparison voltage.

The invention discloses a non-inductive multifunctional electrospinning micro-pyramid array film and a preparation method thereof. The preparation method comprises the following steps of firstly, preparing a polymer precursor solution; adding the precursor solution into a conductive needle head, and connecting high voltage to the needle head, so that the precursor solution forms charged fibers with a heterostructure; continuously collecting the fibers by adopting a grounded conductive receiver; next, depositing the subsequently sprayed fibers with the heterostructure spontaneously and preferentially at the position where the collected fibers are thicker; and then, volatizing a solvent under the normal temperature condition, and finally obtaining the ultra-light film with the electrospinning micro-pyramid array. The film not only has non-inductivity for long-term use, but also has multiple super properties in the aspects of pressure sensing, radiation refrigeration, piezoelectricity, triboelectricity, hydrophilicity and hydrophobicity and the like.

The invention provides a preparation technology of an American ginseng mask, and belongs to the technical field of skin care cosmetics. The technology specifically comprises the following steps: finely selecting raw materials and additives; grinding the raw materials; disinfecting and sterilizing the raw materials; sterilizing and disinfecting the raw materials; mixing and stirring the raw materials and the additives; extracting and inspecting the product obtained in step 4; forming the qualified mask; and packing the finished product. With the adoption of the technology, the mask production efficiency is improved; the mask is closer to the skin and cannot adsorb the water of the skin after being applied for a long time; and meanwhile, panaquilon, American ginseng alcohol and American ginseng acid of American ginseng can permeate the basal layer being 0.3mm in depth within 10-30min, so that the moisturizing and caring effects are improved; the technology has the advantages of being simple in preparation process, natural, environmentally friendly, good in care effect, natural and healthy in mask, gentle, free from skin irritation and free from sensitivity.