69results about How to "Temperature insensitive" patented technology

The present invention describes a method and apparatus for forming a uniform silicon containing film in a single wafer reactor. According to the present invention, a silicon containing film is deposited in a resistively heated single wafer chamber utilizing a process gas having a silicon source gas and which provides an activation energy less than 0.5 eV at a temperature between 750° C.-550° C.

An improved two-piece container seal suitable for sealing a container having a removable closure and for lining the closure comprises a flexible sealant sheet and a flexible liner sheet bonded thereto. The sealant sheet and liner sheet are of the same size and shape. The sealant sheet has a sealing surface and a first thermoplastic surface, and the liner sheet has an outer surface and a second thermoplastic surface. The first and second thermoplastic surfaces are in opposed, congruent contact with each other, and the first thermoplastic surface is ultrasonically welded to the second thermoplastic surface by an array of spaced, frangible ultrasonic welds, forming an adhesive-free interface therebetween. A method of manufacturing a two-piece container seal and a sealed container comprising a two-piece container seal are also described.

One embodiment provides a process for preparing an asphalt-coated crumb rubber composition that meets the specification set forth in ASTM D80-02 or deviations thereof which may be established by the specifying agency from time to time. The process generally comprises obtaining asphalt of different penetration grades, combining the asphalt of each grade with preselected chemicals to form separate premixed components, blending the premixed components together under predetermined conditions to form, upon curing, an asphalt-coated crumb rubber composition that meets certain physical requirements for asphalt-rubber binder (ARB), such as those set forth in ASTM D8-02. Advantageously, the resulting asphalt-coated crumb rubber composition not only meets the physical requirements of ARB used in road paving but also has improved dispersion of the rubber, such as dispersion of the rubber in an oil-in-water emulsion of an asphalt.

An accelerometer and a method of fabricating an integrated accelerometer comprises the steps of providing an SOI wafer with a selected resistivity to eliminate any need for additional doping of the SOI wafer, providing a single mask on the SOI wafer, and simultaneously defining all components of the accelerometer in the SOI wafer without using any pn-junctions to define any piezoresistive components and to provide the same resistivity of all components. The step of simultaneously defining all components of the accelerometer in the SOI wafer comprises defining all components of a linear or angular accelerometer.

The invention relates to a beet pectin and an extraction method thereof, and concretely relates to a beet pectin with good emulsibility, good emulsification stability and excellent yield stress, and an extraction method thereof. An acid extraction-cooling-pH adjustment-alcohol precipitation technology adopted by the extraction method further improves the emulsion turbidity, the purity and the yield stress of the obtained beet pectin. The beet pectin is especially suitable being used in stabilizers and emulsifiers in the food industry in order to improve the economic benefit of the sugar industry, and provides a good approach for further comprehensive utilization of wastes.

The invention discloses a polyurea type polyurethane coating, a raw material composition and use of the polyurea type polyurethane coating. The raw material composition of the polyurea type polyurethane coating contains a prepolymer and polyol and does not contain organic solvent, and the mass ratio of prepolymer to polyol is 1 to (0.8-2). A coating prepared from the raw material composition is relatively short in surface drying time, has very good mechanical property, does not contain organic solvent and is environmentally friendly, convenient to use and relatively suitable for being used asa manual patching material.

The invention discloses a method for manufacturing a near infrared waveband three-dimensional photonic crystal, wherein an one-dimensional crystal mask is formed by utilization of holographic interference, and is transferred onto a SiO2 layer on a silicon substrate material through ion beam etching or reactive ion beam etching; high refractive index materials are filled into an etched groove; the surface is polished by the ion beam etching method, and then SiO2 is deposited; a second layer is formed after coating of photoresist, holographic photoetching, ion beam etching and so on; the steps are repeated, and layers are aligned by the Moire fringe technique; and finally the SiO2 is removed by the acid washing method, and the three-dimensional photonic crystal required is obtained. The method fully utilizes the submicron resolution of holographic photoetching, can manufacture the large-area three-dimensional photonic crystal which can then be cut into small blocks as required, has the advantages of high efficiency and low cost, and simultaneously is convenient to overcome the defects of introduction of large area and periodicity by changing wave fronts of two beams of coherent light in an interference field.

The invention discloses a sensitive element of a three-dimensional micro force sensor based on a flexible mechanism. The sensitive element of the three-dimensional micro force sensor based on the flexible mechanism comprises flexible UPU branch chains and a spherical structure, wherein the flexible UPU branch chains are of a symmetrical structure. According to the branch chains, two pairs of first round flexible hinges and second round flexible hinges achieve a U pair and are symmetrical, two pairs of symmetrical cantilever beams are connected in parallel to achieve a movable pair, and one pair of flexible hinges of which the incision directions are opposite achieve a U motion pair at the input end. The sensitive element of the sensor comprises the three flexible branch chain structures used for converting acting force to be strain, the three branch chains are vertically arranged to measure force in the three vertical directions, and the spherical structure senses external force needing to be measured and is arranged at the center formed by the branch chains. The structural type of the space 3-UPU flexible parallel mechanism serving as the sensitive element is adopted, and the sensitive element of the three-dimensional micro force sensor has the advantages of achieving three-dimensional decoupling force sensing, being high in flexibility and wide in bandwidth range, and the like. The designed sensitive element of the three-dimensional micro force sensor can be used in the fields such as precision machining, precision measurement, nanoscience and technology, and the like.

A sliding guide, for instance for an arm support (A), comprising at least a first and an at least second profile, with bearing and friction elements included therebetween for providing a particular frictional resistance between the profiles, wherein the profiles are provided with fastening elements, wherein the first and second profiles on both sides in the longitudinal direction are provided with respective connecting longitudinal edges, which cooperate in order to allow sliding of the second profile relative to the first profile, wherein the bearing and the friction elements are provided between the profiles near the respective connecting longitudinal edges thereof in order to provide an internal space (I) between the at least first and the at least second profile. The invention further relates to an arm support (A) provided with such a sliding guide.

The invention relates to an integrated switched reluctance machine flywheel energy storage device, belonging to the technical field of the design and preparation of the electric motor. The flywheel energy storage device comprises a switched reluctance machine and a bidirectional power inverter connected with the output end of the electric motor, wherein the outside of the switched reluctance machine is provided with a vacuum shell, the inside of the shell is provided with a stator, a rotor, an upper magnetic suspension bearing and lower magnetic suspension bearing used for supporting the rotor; the switched reluctance machine has an external rotor structure, the rotor is also used as the flywheel, a rotary inner bushing is fixed between the rotor and the stator, and a rotary outer bushing is fixed between the rotor and the vacuum shell. The device of the invention cancels the intermediate transmission unit through which the traditional flywheel is connected with the electric motor in the coupling manner and the like, thus reducing the noise and friction of the system and increasing the efficiency and reliability of the system.

The invention discloses a vibration measurement device based on a coreless optical fiber, which includes a data acquisition module, a photoelectric detector, a coupler, an erbium-doped optical fiber, a wavelength division multiplexer, a light source, an isolator and a coreless optical fiber sensing structure; The first end of the multiplexer is connected to the light source, the second end of the wavelength division multiplexer is connected to one end of the erbium-doped fiber, the other end of the erbium-doped fiber is connected to the first end of the coupler, and the second end of the coupler is connected to One end of the coreless fiber sensing structure, the other end of the coreless fiber sensing structure is connected to one end of the isolator, the other end of the isolator is connected to the third end of the wavelength division multiplexer, and the third end of the coupler is connected to The input end of the photodetector, the input end of the data acquisition module is connected to the output end of the photodetector. The invention can overcome the influence of temperature on the vibration measurement and improve the measurement accuracy.

The invention discloses an FBG (fiber bragg grating) based pressure sensor and application thereof, and belongs to the technical field of optical fiber sensing. A support optical fiber and an optical fiber with an FBG-FP (Fabry-Perot) structure are parallelly clamped between two metal plates; the two metal plates completely cover two FBGs of the optical fiber with the FBG-FP structure to serve as a Fabry-Perot structure section of a reflection surface, and two ends of the optical fiber with the FBG-FP structure are arranged on the outer sides of the two metal plates respectively; the opposite surfaces of the two metal plates are smooth planes. The optical fiber with the FBG-FP structure serves as a measuring element, pressure applied to the outsides of the metal plates is transmitted to the measuring optical fiber through the metal plates, and the two ends of the optical fiber, with the FBG-FP structure, on the outer sides of the two metal plates can serve as signal connection ports of a corresponding detection instrument. By applying the pressure sensor for measuring, accurate dual-wavelength laser and microwave signals generated by a resonator laser can be respectively measured conveniently.

An electrical device for detecting moisture has a detection cable (10a, 10b, 10c) made up of a first element (1) and of a second element (2a, 2b, 2c) which elements are elongate and electrically conducting and separated by a polymer-based material (3), and an electrical resistance measurement appliance intended to measure the electrical resistance between the first and second elements of the the cable, where the material (3) is a non-soluble and moisture-sensitive material.

The invention relates to a three-dimensional gallium nitride-based exhalation type gas sensor and a preparation method thereof, and belongs to the technical field of gas sensors. A two-dimensional unintentionally doped and n-type GaN thin film is formed on a sapphire substrate in an epitaxial mode, then a Ni/SiO2 hexagonal mask plate is prepared, a high-quality Nano p-i-n structure grows on the mask plate in an epitaxial mode, and a novel Nano p-i-n diode is formed; and the Nano p-i-n structure and a PDMS/graphene transfer electrode technology are combined to prepare the gas sensor with high sensitivity and high selectivity. The GaN-based device adopted by the invention is relatively insensitive to temperature, relatively stable in device performance, good in biocompatibility and environmental friendliness, simple and easy to operate in detection process, high in result repeatability and low in equipment maintenance cost.

The invention provides an isolation amplifier which comprises a sending end, an isolation layer and a receiving end. The sending end is connected with the isolation layer and is used for amplifying the input signal of the isolation amplifier, modulating the amplified input signal of the isolation amplifier by adopting a closed-loop circuit, generating a modulation signal and sending the modulationsignal to the isolation layer; one end of the isolation layer is connected with the sending end, the other end is connected with the receiving end, and the isolation layer is used as a unique signaltransmission channel between the sending end and the receiving end to transmit modulation signals to the receiving end; the receiving end is connected with the isolation layer and is used for demodulating and amplifying the modulation signal and outputting an amplified signal; and the duty ratio of the modulation signal is in linear relation with the amplified input signal of the isolation amplifier. According to the invention, modulation is carried out by using a closed-loop method, errors are effectively suppressed, and the performance is improved. And meanwhile, the modulation circuit and the demodulation circuit adopt almost the same structure, so that the precision can be improved more effectively.

The invention discloses a carbon dioxide sensor for monitoring microbial growth and a preparation method thereof, and belongs to the technical field of carbon dioxide sensors and preparation methods thereof. The technical problem to be solved is to provide an improvement of a carbon dioxide sensor hardware structure for monitoring microbial growth. According to the technical scheme, an n-type gallium nitride layer is grown on a sapphire substrate in an epitaxial mode, a Ti/Al/Pt/Au electrode is deposited on a gallium nitride epitaxial wafer through a series of electrode preparation processes, and then a BP-PEI layer is prepared through liquid phase stripping of black phosphorus and functional modification of the black phosphorus, so that the miniaturized carbon dioxide gas sensor which is high in sensitivity and can be operated in real time is obtained. The carbon dioxide sensor is stable in performance, good in carbon dioxide gas-sensitive performance, low in price, small in size and simple in detection mode, and has the advantages of being disposable, free of pollution and the like. The carbon dioxide sensor is applied to monitoring of microbial growth.