8results about How to "Extended operating time" patented technology

According to the logarithmic scale adaptive multi-window power spectral density estimation method provided by the invention, the conicity degree is adjusted through the equilibrium relationship between the deviation and the variance, the problems of low resolution and high algorithm complexity of the existing adaptive sine window algorithm are solved, and the improvement of the adaptive sine window algorithm is realized. The method comprises the following steps: firstly, initializing conicity degrees, setting the conicity degrees at all frequencies as fixed values, and calculating a power spectral density initial value; secondly, cone degree gradient processing is carried out on low-frequency signals, the cone degree is smoothed through filters with different intensities at different frequency bands, and then the optimal cone degree of the whole frequency domain is obtained; and finally, carrying out iterative operation on the conicity degree and the power spectrum density to obtain an optimal power spectrum density estimation value. Compared with an LPSD algorithm, an adaptive sine window algorithm and an LISA-LPSD algorithm, the method provided by the invention has the advantages of high spectrum resolution, low algorithm complexity and the like.

The present invention relates to a high-performance resin matrix suitable for room temperature RTM process and a preparation method thereof, belonging to the technical field of epoxy resin preparation. The high-performance resin matrix comprises the following components in parts by weight: 80-120 parts of multifunctional epoxy resin, 1-15 parts of epoxy diluent, 80-220 parts of anhydride curing agent, and 1-3 parts of catalyst. The present invention selects a glycidyl ester epoxy resin with low viscosity as the resin matrix, and reduces the viscosity of the resin and increases its operating time by introducing a small amount of active epoxy diluent; adds anhydride curing agent to further reduce the viscosity of the resin formula and increase its operating time; adds a suitable catalyst to reduce the operating temperature of the resin to room temperature and reduce the curing temperature, so that the resin has the advantages of low viscosity, ultra-long room temperature operating time and low curing temperature; at the same time, it has excellent comprehensive mechanical properties and heat resistance, and is suitable for the RTM molding process of large composite material structural parts.

This utility model relates to the field of power equipment technology and discloses a heat dissipation box for a terminal of a power distribution automation station. The box includes a distribution box with a door rotatably connected to its side wall, a rain shield fixedly connected to its upper surface, a cooling fan inside, a dustproof component on its side wall, and a movable component inside. The movable component includes a sliding frame, and a slide rail is fixedly connected inside the distribution box. In this utility model, when electrical components need to be installed or maintained, the operator moves a lever to compress a first spring and move the locking pin out of the slide rail, releasing the sliding frame and allowing the mounting plate position to be adjusted along the slide rail. After adjustment, releasing the lever causes the first spring to push the locking pin back into the slide rail slot, re-fixing the sliding frame. This solves the problems of fixed mounting plate position and inconvenient component installation and maintenance in traditional distribution boxes, shortening operation time.

The invention discloses a high-flame-retardant pouring sealant and a preparation method thereof, and belongs to the field of flame-retardant materials. The pouring sealant comprises a component A and a component B, wherein the component A comprises the following raw materials: a base adhesive, an inorganic filler, titanium dioxide, a flame retardant and a deep curing agent; the component B comprises the following raw materials: a diluent, a waterproof agent, a cross-linking agent, a coupling agent and a catalyst, the inorganic filler comprises at least one of aluminum hydroxide or magnesium hydroxide, and the flame retardant comprises at least one of UN-333, melamine phosphate, melamine cyanurate or melamine polyphosphate. According to the high-flame-retardance pouring sealant, the flame retardance of a product can be improved by adding a small amount of flame retardant, the flame retardance of the pouring sealant can also be enhanced by adding a proper amount of magnesium hydroxide filler, and the flame retardant grade is UL94V0 grade. The pouring sealant can quickly realize deep curing, has a synchronous curing effect on the surface and the interior of the sealant, and also has excellent tensile strength and elongation at break, low sealant viscosity, good flowability and excellent aging resistance.

The present invention relates to the technical field of number theory transformation calculation, and specifically discloses a hardware implementation method, device and security chip for number theory transformation, including: obtaining polynomial data to be calculated, and calculating the rotation factors and inverse rotation factors required for number theory transformation of the polynomial data to be calculated; writing the rotation factors and inverse rotation factors into different storage spaces respectively, and the storage address of the storage space of the inverse rotation factor is determined by adding 1 to the storage address of the storage space of the rotation factor; preprocessing the polynomial data to be calculated; calling a number theory transformation hardware calculation unit, reading the rotation factors, inverse rotation factors and the preprocessed polynomial data to be calculated for number theory transformation calculation, and the calculation results of each two adjacent calculation stages are stored in two storage spaces with adjacent storage addresses in a circular manner. The hardware implementation method for number theory transformation provided by the present invention can reduce the hardware storage space occupancy rate without increasing the cost.

The utility model discloses a high-speed circuit breaker test control device, and belongs to the technical field of high-speed circuit breaker test. Comprising a power supply control unit which is connected with an AC 220V AC power supply, the power supply control unit is used for providing a voltage-stabilized power supply, a channel conversion unit is electrically connected with the power supply control unit and a load control unit, a signal control unit is electrically connected with the power supply control unit, and low voltage is provided for the signal control unit through the power supply control unit; the signal control unit is used for controlling the load control unit, the load control unit is electrically connected with the power supply control unit, the channel conversion unit, the signal control unit and the external high-speed circuit breaker at the same time, the power supply control unit provides high voltage for the load control unit, and the load control unit is used for feeding back the power-on condition of the external high-speed circuit breaker. According to the utility model, the ammeter is added in the load circuit and is used as a visual window for current passing through the coil of the external high-speed circuit breaker, so that maintenance personnel can conveniently monitor the current of the coil in real time, discover abnormity and deal with the abnormity in time, and test the high-speed circuit breakers of two common models by operating the channel conversion unit and switching the test interface.

The invention relates to a winding angle deviation detection and correction method and system for a thermal sensor, and belongs to the technical field of thermal sensor production and detection.The method comprises the steps that S1, a winding image of a capillary tube in the winding process is obtained; s2, selecting an interested area of the winding image, wherein the interested area is an area where a capillary tube and a wire guide needle are located; s3, identifying a winding angle formed by winding each winding wire on the capillary tube in the region of interest; s4, whether deviation exists in the winding angle or not is judged, and if deviation exists in the winding angle, the deviation angle of a wire guide needle for conveying a wire is adjusted so that the winding angle can be changed; and if the winding angle has no deviation, continuously detecting until the winding of the capillary tube is finished, thereby obtaining the thermal sensor. According to the invention, whether the winding angle of the capillary tube has deviation or not can be effectively detected, the deviation is adjusted, and the yield of the thermal sensor can be effectively improved.

The invention discloses an electron beam detection method on a semiconductor process line, a cold field electron-emitting source emitter with a nano-scale convex structure and a manufacturing method of the cold field electron-emitting source emitter. The cold field electron-emitting source emitter is applied to electron beam detection equipment on the semiconductor process line. The cold field electron emission source emitter with the nano-scale protruding structure applied to electron beam detection equipment on a semiconductor process line comprises a needle point part and the nano-scale protruding structure. The tip portion is formed at the tip of the emitter. The nano-scale protruding structure is formed on the surface of the needle tip portion, the nano-scale protruding structure is an atom stacking structure, and the cold field electron source is operated in a vacuum environment below 3 * 10 <-9 > mbar.