9results about How to "Accurate balance" patented technology

The invention relates to a controllable variable-diameter stabilizer for petroleum drilling and an application method.The controllable variable-diameter stabilizer for petroleum drilling comprises an electric mechanical driving module, an intelligent control module, a sensor feedback module and a communication module, and the electric mechanical driving module receives an instruction from the intelligent control module through an electronic signal; adjusting the outer diameter of the driving stabilizer; the intelligent control module receives data from a ground sensor or an underground sensor, calculates underground working conditions in real time and automatically adjusts the outer diameter of the stabilizer; the sensor feedback module is used for monitoring key parameters such as the posture of a drilling tool, a well track and bit pressure; the hydraulic auxiliary module and the electric mechanical driving module work cooperatively to provide dual assurance; the communication module is responsible for data transmission between an underground control center and a ground control center. According to the stabilizer, the performance of the stabilizer in the oil and gas drilling process is remarkably improved, the efficiency in the oil and gas drilling process is greatly improved, accurate and efficient outer diameter self-adaptive adjustment is achieved, and the safety and efficiency in the drilling process are remarkably improved.

The invention discloses a steel cloud warehouse inventory and income prediction system based on deep learning. The system integrates multi-source data, and realizes the fusion of inventory, market, economy and policy data through a data acquisition and preprocessing module; a convolutional neural network, a recurrent neural network and a variational auto-encoder are adopted to perform multilevel feature extraction and analysis on inventory data; constructing and analyzing a relation network between agents and steel mills by using a graph neural network, identifying key nodes and evaluating the influence of the key nodes on inventory and financial income; through a multi-factor financial model and an optimization framework, system parameters are dynamically adjusted, and enterprise financial incomes are optimized. The system outputs visual prediction and situation simulation results, and provides high-precision decision support for enterprises. The system provides data support for enterprise supply chain management and financial decision making in a complex market environment.

A mounting apparatus (100) comprising a housing adapted to be removably attachable to a support means, the mounting apparatus further comprising a platform (102) attached to a housing pivotally attached to the housing and rotatable relative thereto about an axis (O), where the housing has an annular cam (106) arranged therein, the annular cam (106) being adapted to engage with the platform (102), and the platform (102) being adapted to engage with the platform (102). The invention relates to a device (100) for operating a motor vehicle, comprising a cam (110, 116) arranged concentrically with said axis and having an inner cam surface (118), and comprising a cam follower (110, 116) comprising a cam engagement surface adapted to engage with and follow said inner cam surface upon rotation of said cam about said axis, said cam follower having a yoke engagement surface adapted to engage with and follow said inner cam surface upon rotation of said cam about said axis. The yoke engagement surface is adapted to engage with a yoke (136) and to transfer a force between the cam follower and the yoke. Rotation of the housing relative to the housing provides transmission of force between the platform and a spring arrangement.

The invention discloses an ore dressing device and method based on parameter intelligent control and dust removal recovery, and relates to the technical field of ore dressing. The device comprises an ore crushing and screening mechanism, a dust removal and recovery mechanism and an intelligent control module, the ore crushing and screening mechanism is provided with an ore recognition device used for recognizing ore types and a dust monitoring unit used for detecting the dust concentration in a box body, and the intelligent control module is in signal connection with the ore recognition device and the dust monitoring unit. And the control module is in control connection with the crushing assembly and the dust collector, adjusts working parameters of the crushing assembly according to the ore category, and adjusts working parameters of the dust collector according to the dust concentration. The method executes a parameter identification and control process based on the device. Crushing parameters can be automatically matched according to the ore characteristics, the dust collection power is adjusted in real time according to the dust generation amount, cooperative improvement of the crushing and screening efficiency and the dust removal effect is achieved, and meanwhile energy consumption is reduced.

The invention discloses a transmission link quality-based geometric transformation precision adaptive adjustment mechanism, which comprises the following steps of: acquiring a basic quality parameter, a dynamic stability parameter and a link type parameter in real time, and calculating a comprehensive link quality score through a weighting algorithm of basic fixed weight + scene dynamic adjustment; a dynamic mapping model of quality scores and encryption strength is constructed, machine learning adaptive optimization and user-defined intervention functions are fused, and comprehensive scores are divided into five grades corresponding to different geometric conversion precision and encryption enhancement strategies. The beneficial effects of the invention are that the technical scheme breaks through the limitation that the prior art only depends on single parameter adjustment through an innovative multi-dimensional link quality evaluation system and a dynamic mapping model, can accurately adapt to complex and changeable network environments, and can accurately adapt to complex scenes such as multi-device interference and signal abrupt change. And efficient and stable data transmission can still be maintained.

This invention discloses a PCB high-current layout structure and method based on EMB (Electronic Power Module), relating to the field of PCB high-current layout technology. It includes a PCB body, on which high-current trace areas corresponding to the three-phase motor power supply circuit of the EMB system are divided. Each high-current trace area is provided with at least one current-carrying enhancement structure. The current-carrying enhancement structure includes any one or more combinations of a board-edge exposed copper solder enhancement structure, a segmented metal block current-carrying structure, and an integral polygonal metal current-carrying structure. This invention significantly improves the current-carrying capacity of high-current traces without increasing the PCB area through three flexibly combinable current-carrying enhancement structures, perfectly adapting to the compact design requirements of EMB systems with limited installation space. The current-carrying enhancement structure also has a heat dissipation enhancement function, significantly improving heat dissipation efficiency, effectively solving the problem of localized overheating of traces under instantaneous high-current conditions, delaying PCB aging, and improving the operational stability of the EMB system.

The invention provides a power device design method and system, and relates to the technical field of chip design, and the method comprises the steps: determining the expected breakdown voltage of a power field effect transistor; determining epitaxial layer doping concentration, epitaxial layer thickness and epitaxial layer resistivity of the power field effect transistor; determining the well width and the well depth of the power field effect transistor by combining an electric field uniformity principle; calculating estimated on-resistance of the power field effect transistor under different geometric unit types and different well spacing by combining a distribution mode of an electric field in a depletion region of the power field effect transistor; determining a target geometric unit type; calculating the optimal well spacing of the power field effect transistor based on the target geometric unit type; and outputting the epitaxial layer doping concentration, the epitaxial layer thickness, the epitaxial layer resistivity, the well width, the well depth, the target geometric unit type and the optimal well spacing as design parameters. While high performance of the power device design is ensured, the design period is shortened, and the design cost is reduced.

Embodiments of the present application provide a voltage measurement circuit and method, a circuit board, and a control module. The circuit is used for measuring a voltage output by a battery, the battery comprising n battery cells connected in series, wherein n is an integer greater than 1; and the circuit comprising: n low-voltage measurement modules provided in one-to-one correspondence with the n battery cells, a first switching circuit, a second switching circuit, a reference voltage source, and a control module, wherein the reference voltage source is used for outputting a preset reference voltage; and the two ends of each of the low-voltage measurement modules are connected to the two ends of a corresponding one of the battery cells via the first switching circuit, the two ends of each of the low-voltage measurement modules are further connected to the two ends of the reference voltage source via the second switching circuit, and the control module is connected to switching units in the first switching circuit and the second switching circuit, and the control module is further connected to each of the low-voltage measurement modules. The present application makes it possible to balance large-range measurement and measurement precision.

The invention belongs to the technical field of fuel cell testing, and particularly relates to an off-grid fuel cell testing device, a control method thereof and a medium. The method comprises the following steps: after a testing device reaches a stable state, when transient characteristic testing of the fuel cell is carried out, a DC / AC converter of the testing device adopts voltage closed-loop control; when a fuel cell long-term steady state test or a working condition change test is carried out, the DC / AC converter adopts open-loop control; in the voltage closed-loop control, the deviation between the actual voltage of a direct current bus at the direct current side of the DC / AC converter and the reference voltage of the direct current bus is input into a voltage closed-loop controller, and a d-axis voltage reference value used for generating a modulation wave is obtained; and in the open-loop control, obtaining the d-axis voltage reference value according to a modulation degree and a modulation coefficient. The technical problem that in the prior art, a single converter control strategy cannot meet the fuel cell test requirement is solved.