35results about How to "Fast thermal response time" patented technology

The utility model belongs to a microwave power measurement system, specifically discloses a megawatt grade impulse microwave power measurement system based on calorimetric method, wherein an outlet temperature pickup is arranged on the stream outlet of a water pipe and an electric heater is arranged in the water pipe; the electric heater is connected with a rated power electricity supply; a microwave detecting device is arranged on the inlet of a microwave power absorbing device; the water runs through the inwall water pipe of the power absorbing device and an inlet temperature pickup is arranged on the stream inlet of the water pipe; an NTC thermal resistance R3 of the inlet temperature pickup is connected with a equilibrium resistance R1, while an NTC thermal resistance R4 of the outlet temperature pickup is connected with a equilibrium resistance R2; the NTC thermal resistance R3, the NTC thermal resistance R4, the equilibrium resistance R1 and the equilibrium resistance R2 form a Winston bridge and the Winston bridge is connected with a differential amplifying circuit. The utility model can measure the multiplex pulse high-power microwave power in millimetric wave band and the measuring range can be one kilowatt up to two or three megawatt.

The invention relates to a new epoxy resin shape memory macromolecule material and a relative preparation method, wherein the material contains liquid crystal epoxy resin monomer and curing agent at stoichiometry, which may further contains curing accelerator of 0-2% consumption of the total accounts of the liquid crystal epoxy monomer and curing agent. Compared with prior shape memory material, the inventive material has the advantages that (1), the thermal responsible temperature can be adjusted by adjusting the side chain and substituted chain of the liquid crystal epoxy monomer or by selecting curing agent, (2), the heat response time is short and the shape recover is rapid, (3), the product can realize saturated shape memory effect, (4) the product has simple preparation and clear structure.

The invention relates to a platinum resistance temperature sensor with high intensity and fast response. A temperature-sensing element is installed at a small diameter part of a reducing temperature-sensing drivepipe, and insulating materials are filled up between the back end of the temperature-sensing element and the temperature-sensing drivepipe. An inner protective tube is provided with a sheathed signal cable leading wire, and the sheath signal cable leading wire is connected with the temperature-sensing element. The temperature-sensing drivepipe and the inner protective tube are welded together and form a thermometer core, and a sealed tube is welded with the thermometer. A bottom hole is formed in the bottom of a small diameter part of a conical outer protective tube, three groups of diversion holes dividing the circumference equally are formed in the small diameter part of the conical outer protective tube in a radical direction, each group of diversion holes are provided with a plurality of diversion holes along an axial direction, and the rear end of the outer protective tube is in threaded connection with a base of a media fluid channel. The inner cavity of the inner protective tube fits with the inner cavity of the outer protective tube, the inner protective tube and the outer protective tube are connected and sealed with a Swagelok, and the Swagelok body is welded with the outer protective tube. The platinum resistance temperature sensor fits in with the special requirements of high temperature, high pressure and high speed media fluid, and possesses fast thermal response.

The invention belongs to the field of material engineering and discloses a liquid crystal epoxy resin with a shape memory effect and a preparation method and application thereof. The preparation method of the liquid crystal epoxy resin with the shape memory effect comprises the following steps: heating to melt 100 parts of epoxy resin, adding 1.22-42.59 parts of unitary aliphatic amine, mixing uniformly, finally adding 10.57-26.20 parts of curing agent, and melting uniformly; pouring the obtained mixture into a preheating mould, heating to cure, and cooling to 20-30 DEG C to obtain the liquidcrystal epoxy shape memory material. The thermal response temperature of the liquid crystal epoxy resin with the shape memory effect can be adjusted conveniently, and the liquid crystal epoxy resin is short in thermal response time and high in shape recovery speed and still has the good shape memory effect after being subjected to repeated and circulatory shape memory.

The invention provides a shape memory phenolic resin and a preparation method thereof. The shape memory phenolic resin comprises, in parts by weight, 100 parts of resole phenolic resin, 5 to 15 parts of isocyanopolyurethane prepolymer, 1 to 15 parts of Hardener. The shape memory phenolic resin provided by the present invention reduces the crosslinking density of the phenolic resin and increases the crosslinking point by introducing a polyurethane flexible segment on the benzene ring and using a longer molecular segment of the polyurethane flexible segment to modify the phenolic resin. The length of the molecular segments in between, so that the molecular structure of the shape memory phenolic resin has two molecular segment structures of hard segment and soft segment, which improves the toughness of the phenolic resin and makes the shape memory phenolic resin have the shape memory effect. be applied in more fields.

The invention relates to a safe protective device of electric heating container, which comprises a electric heating element formed by a electric heating ring and a heat conductive plate; a heat power device formed by a dual metallic plate and a top rod; and a electric switch formed by a movable contact point, a movable contact plate, a stable contact point and a stable contact plate. Wherein, thedual metallic plate are movably connected to one end of top rod; another end of top rod is supported to the movable contact plate; the central section of independent heat conductive device is insulated from the heat conductive plate which has at least one dual metallic plate; the independent heat conductive device has a thermal sensitive feeler heat connected to the heat conductive plate of electric heating container. The dual metallic actuator can feel the temperature via the feeler of heat conductive device; and the independent heat conductive device has tight heat contact with the heat conductive plate of heater to solve the problem of slow response speed. The invention has simple structure, fewer elements, and improved reliability and safety.

The invention discloses an iron-based amorphous alloy, a preparing method of the iron-based amorphous alloy and application of the iron-based amorphous alloy to an electrical heating material. The iron-based amorphous alloy is composed of FeaTibNicBdPeCfMg, wherein a, b, c, d, e and f are all atom percents, a is larger than or equal to 45 and smaller than or equal to 70, b is larger than or equalto 10 and smaller than or equal to 25, c is larger than or equal to 3 and smaller than or equal to 20, d is larger than or equal to 5 and smaller than or equal to 15, e is larger than or equal to 1 and smaller than or equal to 6, f is larger than or equal to 0.5 and smaller than or equal to 3, g is larger than or equal to 1 and smaller than or equal to 5, and the sum of the a, the b, the c, the d,the e, the f and the g is 100; and the component M is at least one of Zr, Y, Ta and Hf. The iron-based amorphous alloy electrical heating material has the good electric heating performance, the low temperature coefficient of resistance is achieved, and the low coefficient of linear expansion is achieved. The iron-based amorphous alloy has the high abrasive resistance, the high corrosion resistance and the good toughness, can be widely applied to various electric heating devices, and has the important industrial application values.