4results about How to "Guaranteed controllable" patented technology

This invention provides a condition monitoring system and method for a converter transformer single-hydrogen device, belonging to the technical field of condition monitoring for converter transformer single-hydrogen devices. To address the technical problem that existing condition assessment instruments cannot efficiently and accurately verify the accuracy of single-hydrogen devices, a simulated pipeline is installed in the middle of the side wall of the sealed cylinder, an oil inlet is installed at the lower part of the side wall of the sealed cylinder, and an oil outlet is opened at the bottom of the sealed cylinder. An electric heater and an oil thermometer are also installed on the inner wall of the sealed cylinder. An oil pressure gauge and an air bladder are installed on the inner side of the top of the sealed cylinder. The air bladder is connected to an air pump located outside the sealed cylinder via a pipeline, and a pressure relief port is also provided on the pipeline. This invention ensures controllable oil temperature and pressure during single-hydrogen device assessment, guarantees that the standard oil concentration at the oil inlet is consistent with the oil concentration detected by the single-hydrogen device, and achieves the verification of the accuracy of the single-hydrogen device.

The application discloses a mechanical structure of a flexible power-assisted exoskeleton system and a control method thereof, and the mechanical structure comprises an actuating unit box, a driving device, a main controller, a power module, an intention detection component and a power-assisted unit; the body function of a user can be enhanced under different environments, including climbing, crawling, going upstairs and downstairs; the control method is characterized in that an inertial measurement unit is fixed on each main limb of the human body, and the real-time measured limb posture data are transmitted to the main controller; the main controller performs mean filtering and preprocessing on the data, so that the credibility of the data is enhanced; the main controller obtains the corresponding human motion phase according to the posture analysis of different human motions; finally, the main controller sends a driving signal to the driving device according to a preset power-assisted strategy, and the motor rotates according to the signal, so that power assistance is achieved. The application has the advantages of simple algorithm, high real-time performance, strong stability, low hardware cost, low hardware demand and easy engineering application implementation.

The invention discloses a high-throughput preparation method of nearly-fully-compact refractory metal carbide high-entropy ceramic, and belongs to the field of powder metallurgy. The method comprises the following steps: uniformly mixing a series of refractory metal carbide high-entropy ceramic raw materials; stacking a series of mixed raw materials with different components; and performing high-pressure sintering to obtain a multi-component series refractory metal carbide high-entropy ceramic compact block. According to the method, raw material layered stacking and high-pressure sintering strategies are combined, samples with different components are separated by using isolating membranes which do not participate in reaction, and a plurality of continuous independent sintering spaces which are distributed in the gravity direction and have consistent local sintering conditions are provided in the sintering process; by combining high-pressure sintering, the sintering temperature required by near full compactness (the compactness is greater than or equal to 98%) of the refractory metal carbide high-entropy ceramic is reduced, and the problems of high temperature, low compactness and low preparation efficiency of various components in preparation of the refractory metal carbide high-entropy ceramic are solved; the method is of great significance to rapid screening of refractory metal carbide high-entropy ceramic components capable of forming a single-phase solid solution and batch acquisition of performance data.

The invention belongs to the technical field of powder metallurgy, and specifically relates to a cemented carbide and a preparation method thereof. While a metal bonding phase is doped in a later stage, composite powder is pretreated to ensure controllable components of the composite powder and stability of alloy components and performance. Uniformly dispersed cobalt acetate is converted into elemental cobalt through pretreatment, and a segmented pretreatment method is adopted to ensure thorough conversion in each step. Sintering is performed after the pretreatment, and the prepared cemented carbide has good density and low porosity.