53results about How to "Reduce system cost" patented technology

The invention discloses a semiconductor device and a preparation method thereof, a power module, a power conversion circuit and a vehicle, and relates to the technical field of semiconductors, a semiconductor body of the semiconductor device is set as a first conductive type, a first surface of the semiconductor body is provided with a gate trench, and a trench gate structure is located in the gate trench. The semiconductor body further comprises a first region of the first conduction type, a well region of the second conduction type and a second region of the second conduction type, and the second region and at least part of the first surface are connected with a source electrode of the semiconductor device to form Schottky contact. The Schottky contact reduces the conduction voltage drop, reverse recovery time and reverse recovery energy consumption of the semiconductor device, enhances the conduction performance and surge current resistance of the body diode, avoids the problem that holes enter a drift layer in the follow current process, reduces the risk of double-click degradation of the device, avoids an external follow current diode, and improves the reliability of the device. Therefore, the circuit design complexity and the system cost are reduced.

The invention discloses a tension monitoring method, device and system for a multi-component coupled chain transmission system. The method comprises the following steps: carrying out dynamic modeling and simulation analysis on the multi-component coupled chain transmission system; on the basis of analyzing the basic structure and the working principle of the multi-component coupled chain transmission system, the chain tension of the multi-component coupled chain transmission system is analyzed and calculated; finite element analysis is carried out on the multi-component coupled chain transmission system, and a virtual chain tension sensor is designed; and carrying out experimental research on the virtual sensor design method. Real-time monitoring of the chain tension is achieved through the virtual sensor, the hardware requirement and the system cost are reduced, and the monitoring precision and the real-time performance are improved.

The invention discloses a high-frequency wireless battery charging system based on trajectory optimization and matching network integration and a design method, and relates to the field of high-frequency wireless power transmission. The problems that in the prior art, monitoring of a battery charging curve can be achieved only by combining with large adjustment of input voltage, but components are various, control, detection and regulation schemes are generally complex, and the original intention of high-frequency miniaturization design is deviated to a certain extent are solved. According to the system, a T-type IMN network is constructed, the T-type IMN network comprises an XT1 impedance and an XT2 impedance, the XT1 impedance comprises an LC1 and an LV1, the XT1 impedance in the T-type IMN network is integrated with an output filtering resonant inductor L0 of a power amplifier PA, the XT2 impedance comprises an LC2 and a CV2, the XT2 impedance is integrated with a coil series capacitor Ctx, and residual capacitors in the T-type IMN network are used for device multiplexing. The method is also suitable for the field of change design of dual-mode impedance tracks.

The utility model discloses a photovoltaic power station high heat dissipation energy storage cabinet, which comprises an energy storage cabinet and a heat dissipation device, the energy storage cabinet comprises a heat preservation cabinet and an electric appliance cabinet, the electric appliance cabinet is fixedly connected inside the heat preservation cabinet, and a cold air channel, an air distribution channel and an air return channel are respectively arranged between the electric appliance cabinet and the heat preservation cabinet. The heat dissipation device comprises an air cooling box, an air cooling assembly and a drying box, the air cooling assembly is arranged in the air cooling box, the air cooling box is fixedly connected to the upper end of the heat preservation cabinet and the upper end of the electric appliance cabinet, and the air cooling box is communicated with the air return channel and the cold air channel. The lower ends of the heat preservation cabinet and the electric appliance cabinet are fixedly connected with a drying box, a drying assembly is arranged in the drying box, and the upper end of the drying box is communicated with the cold air channel and the air distribution channel. The utility model aims to provide the high-heat-dissipation energy storage cabinet which is efficient in heat dissipation, stable in operation and high in reliability.

The invention discloses an in-service hollow slab bridge steel strand broken wire long-term real-time monitoring system and monitoring method based on a black hole waveguide rod, and relates to the technical field of hollow slab bridge steel strand broken wire monitoring. Steel plates are arranged at the two ends of a hollow slab bridge in the transverse direction, and the waveguide rod is arranged on the steel plates installed on the hollow slab bridge in a bonding mode; longitudinally distributed waveguide rods are connected with the waveguide rods arranged on the two sides of the hollow slab to form U-shaped distribution, black hole waveguide rods are installed at the two ends of the U-shaped waveguide rod structure, acoustic emission sensors are arranged at the two ends of the U-shaped waveguide rod structure, and a monitoring terminal is connected with the acoustic emission sensors to receive acoustic emission signals; through the overall structure design and the monitoring method, long-term real-time monitoring of the whole hollow slab bridge can be realized, through improvement of the structure, the overall performance reduction risk of the system is effectively reduced, the long-term stability and maintainability of the monitoring system are ensured, and meanwhile, the complexity of arrangement of hollow slab bridge sensors and the system cost are reduced.

The invention relates to the technical field of geophysical prospecting, in particular to a borehole transient electromagnetic instrument, which comprises a power supply short section and a detection short section, the power supply short section and the detection short section are detachably connected, the borehole transient electromagnetic instrument can be propelled along with a drill rod, and the detection short section can simultaneously measure magnetic field change information in three orthogonal directions. A data storage unit and an attitude measurement module are also integrated. The invention provides a high-integration borehole transient electromagnetic instrument, which can realize integration of borehole trajectory measurement and transient electromagnetic three-component measurement, has the function of storing test data, does not need to connect a communication cable in the test process, and reduces the complexity of system connection.

The invention relates to a single-motor five-gear transmission electric drive axle system and a vehicle. The single-motor five-gear transmission electric drive axle system comprises a motor, a first gear shifting mechanism, a second gear shifting mechanism, a planet row assembly and three transmission gear sets. The planet row assembly comprises a sun gear, a planet gear, a planet carrier and a gear ring; the three transmission gear sets comprise a first driving gear, a first driven gear, a second driving gear, a second driven gear and a third driven gear; the motor is connected with the input shaft, and the input shaft is meshed with the normally-meshed intermediate shaft. The first driving gear and the second driving gear are sequentially arranged on the normally engaged intermediate shaft, and the first gear shifting mechanism is arranged between the first driving gear and the second driving gear; the first driven gear and the second driven gear are fixedly arranged on the sun wheel shaft, the sun wheel shaft is sleeved with the third driven gear in an empty mode, and the second gear shifting mechanism is arranged between the third driven gear and the planet row assembly; five transmission gears are formed through cooperation of the first gear shifting mechanism and the second gear shifting mechanism.

A power measurement circuit, a chip and a communication terminal. The power measurement circuit comprises a power measurement unit (100), a reference current generation unit (200), a voltage-current conversion unit (300) and an operation output unit (400), wherein an output end of the power measurement unit (100) is connected to an input end of the voltage-current conversion unit (300), and an output end of the voltage-current conversion unit (300) and an output end of the reference current generation unit (200) are respectively connected to an input end of the operation output unit (400). By means of the circuit, during the process of a power measurement unit (100) converting, into a direct-current voltage, a received radio frequency signal to be measured, sensitivity adjustment is performed, such that the measurement sensitivity can be effectively adjusted; moreover, a reference current generation unit (200) is used to generate reference currents with different temperature coefficients, such that within a working temperature range, the measurement precision does not change with temperature, thereby ensuring that a voltage ultimately output by the power measurement circuit does not change with temperature, and a relatively high measurement precision is thus realized.

This invention discloses a virtual synchronous low-voltage ride-through control method and system for wind turbines with energy storage coordination. The method includes: real-time acquisition of operating parameters of the wind turbine grid connection point and the energy storage system; determining low-voltage faults based on the effective voltage value of the grid connection point and calculating the voltage drop depth; adaptively updating the virtual inertia and damping coefficient based on the drop depth, and calculating the stator transient flux linkage to generate rotor compensation voltage to suppress overcurrent and electromagnetic torque impact; and performing differential correction based on the updated inertia and damping during the fault recovery phase to suppress active power and frequency oscillations, while simultaneously controlling the energy storage system to output reactive power support and active power support based on voltage and frequency deviations. The energy storage system is a hybrid energy storage system composed of lithium batteries and supercapacitors. This invention adopts a unified virtual synchronous generator control structure, eliminating the need for control mode switching and additional hardware, and effectively suppressing rotor overcurrent and low-frequency oscillations.

This invention discloses a method for restoring turbulent degradation images based on complex amplitude detection, belonging to the field of computational optics imaging technology. This method constructs a computational optics imaging system without a hardware correction unit. It utilizes a wavefront sensor and an imaging sensor to simultaneously acquire Hartmann images and target degradation images. A computational unit performs wavefront complex amplitude reconstruction and aberration correction. Based on this, a physically constrained end-to-end neural network architecture is designed. By reconstructing the wavefront complex amplitude, it achieves accurate mapping and inference from the Hartmann image to the point spread function of the imaging system. Finally, a multi-scale deconvolutional network is combined to complete high-quality restoration of the turbulent degradation image. This invention eliminates the need for a hardware corrector, overcomes the physical limitations of traditional adaptive optics, effectively solves the problem of insufficient point spread function accuracy, and enables time-delay-free and highly efficient turbulent image restoration under low-cost conditions.

The perception-assisted predictive handover method in the high-speed railway tunnel scene of the application belongs to the technical field of wireless communication and intelligent transportation, and the steps include: constructing a bistatic communication and perception integrated architecture, establishing a communication and perception signal model considering double selective channels, deducing a lower bound of Cramer-Rao based on joint time delay-Doppler parameter estimation to establish a perception-assisted location prediction model, designing a three-state predictive handover mechanism based on perception information, and proposing a perception-assisted dual deep Q network algorithm, jointly optimizing handover decision, clamp antenna configuration and power allocation. By integrating perception capability into handover decision, the application realizes predictive switching before signal degradation, significantly improving the handover success rate and communication throughput in the high-speed railway tunnel scene.

The application relates to a data processing method and device based on a streaming media rearview mirror system CMS and a vehicle. The method comprises the following steps: a first domain controller receives video information collected by a streaming media rearview mirror camera; the first domain controller processes the video information to generate image data corresponding to the video information; and the first domain controller transmits the image data to a streaming media display screen for display. The scheme provided in the application can reduce system complexity and system cost and improve the processing efficiency of the video information collected by the streaming media rearview mirror camera.

This invention relates to the field of communication technology, specifically to a collision detection method and related equipment for ultra-short-range shared medium networks. The method includes: a master node broadcasting downlink messages on a downlink channel, and slave nodes sending uplink messages within a shared uplink contention window; each slave node starting an acknowledgment response timer for each sent uplink message and waiting to receive an acknowledgment message from the master node; the master node performing frame check sequence verification on the received uplink messages, and if a verification error is found, sending a verification error alarm message to the slave node at the corresponding source address; the slave node determining a serious collision when the acknowledgment response timer expires, or determining a collision event when it receives a verification error alarm message; and the slave node executing a backoff strategy based on the collision detection results. This invention enables efficient and reliable collision detection without adding additional hardware receivers, reducing system costs and design complexity, and is suitable for ultra-short-range scenarios such as intra-robot communication.

The invention provides a variable runner air cooling battery module cooling method based on a PID (Proportion Integration Differentiation) control strategy. The method comprises the following steps: acquiring temperature signals of all parts of a battery module through a plurality of temperature sensors and transmitting the temperature signals to a battery management system; when the battery management system calculates that delta Tmax is larger than delta TL-delta, delta Tmax is the maximum value of the temperature difference of the battery module, delta TL is a temperature difference threshold value, and the error is delta, it is judged that the temperature difference of all parts of the battery module exceeds a preset temperature difference threshold value, the position of the highest temperature Tmax of the battery module is obtained, and the position of the highest temperature Tmax of the battery module is obtained; and the control valve corresponding to the position where the highest temperature Tmax is located is controlled to be opened, and the control valves at the other air outlets are controlled to be closed, so that the runner mode is switched. The battery module can be cooled more comprehensively in multiple directions, more air can flow through the local overheating part of the battery module, heat dissipation of the local overheating part is better facilitated, and the risk that a battery is overheated is avoided.

This invention discloses a high spatiotemporal resolution millimeter-wave radar imaging system, comprising: a U-shaped antenna array module, wherein the transmitting and receiving antennas are symmetrically distributed in a U-shape, with an element spacing greater than or equal to half a wavelength, adapted to the SAR imaging mechanism, and using an electronic scanning scheme to achieve beam scanning; a radio frequency (RF) module, employing a cyclic one-transmit-multiple-receive mode, completing data acquisition for all transmitting and receiving channels by cyclically switching the transmitting elements to ensure high system refresh rate and spatiotemporal resolution; a signal processing module, receiving multi-channel echo signals, rearranging the echo signals, and using a hardware-parallel accelerated time-domain backpropagation (BP) algorithm for imaging; and a control module, using a microcontroller to control the RF chip of the RF module. This invention verifies the applicability of antenna spacing greater than or equal to half a wavelength in near-field SAR imaging mechanisms, overcomes the dependence of traditional MIMO systems on antenna half-wavelength spacing, achieves high spatiotemporal resolution near-field imaging, and reduces system complexity and cost.

The application discloses a porous array vortex-inhibiting water gap structure applied to a flow channel and a design method thereof, and belongs to the technical field of casting equipment. The porous array vortex-inhibiting water gap structure comprises a water outlet unit fixedly embedded at a water outlet position of the flow channel, and a plurality of porous arrays are arranged on a water outlet end surface of the water outlet unit. The porous array vortex-inhibiting water gap structure is composed of at least two water outlet through holes, and all the water outlet through holes are arranged in a central symmetry around a geometric center of the water outlet unit. The application can destroy the generation condition of the vortex, thereby reducing the slag entrapment and air suction, and improving the ingot quality.

The present application relates to the field of satellite positioning technology, and discloses an inertial navigation RTK measurement system, comprising: a centering pole provided with a bracket, a smart handbook fixed to the pole body of the centering pole by the bracket, and a GNSS antenna provided at the top of the centering pole and connected to the smart handbook, the GNSS antenna being used to receive GNSS satellite signals; the smart handbook being used to obtain GNSS observation data, CORS differential data and inertial raw observation data, perform RTK calculations based on CORS differential data and GNSS observation data, and simultaneously perform combined navigation calculations using inertial raw observation data and RTK positioning results, and generate high-precision position information of a point to be measured in combination with the smart handbook and the GNSS antenna at the position of the centering pole; the bracket being used to fix the smart handbook to ensure that the smart handbook and the GNSS antenna remain relatively fixed. The present application can simplify measurement operations, reduce production and maintenance costs, and reduce waste of resources.

The invention provides a track and field running timing and circle recording method and system based on computer vision, and relates to the technical field of data processing. Number plates on the outer sides of thighs of athletes are recognized through a thousand-frame camera, current electronic circle recording is replaced by recognition of the number plates, a signal sent by an electronic starting gun serves as a starting point of timing, and the number plates are recognized through a computer; when the camera recognizes the athlete, processes the image, calibrates the time of each frame, records the score by taking the frame corresponding to a certain point as a judgment condition, transmits the score to a database of a computer through a USB (Universal Serial Bus), records the score, and obtains the score by reading the time on the frame corresponding to the certain point. According to the technical scheme, interference between a wearing core or a bracelet and detection equipment configured on a finishing line can be avoided, the recorded score of an athlete is more accurate, full-automatic visual identification is used for timing and circle counting, interference of human factors is reduced, and the labor cost and the system cost are reduced.

The present disclosure discloses a remote device, a system and a method for transmission compatible with two TDD switch signals. The method includes: receiving a downlink TDD switch signal; performing a power-on detection on the downlink TDD switch signal; in the case of a successful power-on detection, generating a standard switch signal corresponding to the downlink TDD switch signal; receiving an information of a successful power-on detection and the standard switch signal; comparing the downlink TDD switch signal with the standard switch signal; in the case that a number of abnormal values between the downlink TDD switch signal and the standard switch signal is less than a set value N, outputting a first downlink switching switch signal, a first uplink switching switch signal, a second downlink switching switch signal, and a second uplink switching switch signal related to the downlink TDD switch signal. The disclosed system having a simple design can detect the switch signal, perform error correction on the wrong switch signal, and ensure the correctness of the switch signal.

The invention discloses a sample sampling method, which comprises a sampling step and a cleaning step, and the sampling step comprises the following contents: firstly, extracting a certain volume of cleaning liquid by using a sample adding pump, so that an upper cleaning liquid column is formed in a sample adding needle; extracting the isolation medium by using a sample adding pump to form a section of isolation column at the bottom of the upper cleaning liquid column; finally, a certain volume of sample liquid is extracted to form a lower sample column; the cleaning step comprises the following contents: injecting a lower sample column into a reaction container by using a sample adding pump, moving a sample adding needle to a cleaning station, injecting an upper cleaning liquid column into the cleaning station by using the sample adding pump, and cleaning the sample needle by using the upper cleaning liquid column. According to the invention, the mode of pre-pumping the cleaning fluid and isolating the cleaning fluid by using the isolation column is adopted for sampling, so that accurate control of the amount of the cleaning fluid can be realized, an additional flushing pump and a corresponding pipeline are not needed, the system is simplified, and the installation requirement and the system cost of the system are reduced.

The utility model provides an electrified railway three-phase-to-single-phase traction power supply system, which relates to the technical field of traction power supply and comprises a traction transformer and an active compensation device, the active compensation device is composed of a plurality of variable current power units connected in parallel, and high-voltage direct-hanging large-capacity output is realized between the direct-hanging traction transformer and a railway traction network. An extra matched transformer is not needed, the occupied area is small, the integration level is high, loss and system cost are reduced, and application and popularization are facilitated.

The invention discloses a phased-array antenna control system and method, and the system comprises an antenna control module which is used for generating a global control instruction according to the working parameters of a target wave beam, and modulating the global control instruction into a control signal; the radio frequency combining module is used for combining the control signal and the radio frequency signal to form a composite radio frequency signal; the radio frequency distribution network is used for transmitting the composite radio frequency signals to a plurality of beam forming chips in parallel; and the beam forming chip is used for demodulating a global control instruction from the received composite radio frequency signal and calculating a local control parameter of the corresponding antenna array element based on the global control instruction and locally pre-stored calibration data so as to control the radiation characteristic of the corresponding antenna array element. Therefore, the refresh rate bottleneck caused by serial control can be fundamentally solved, the digital interconnection design of the antenna array plane is greatly simplified, and the PCB complexity and the system cost are reduced.

The invention provides a rope fixed-length cutting structure with a rope clamping mechanism and a transmission mechanism cooperating. The rope fixed-length cutting structure comprises the transmission mechanism, the rope clamping mechanism, a transmission rack and a rope breaking mechanism. The rope clamping mechanism comprises a first clamping jaw, a clamping seat, a first spring, an ejector rod and a push rod, the first clamping jaw is arranged on the clamping seat, the clamping seat is arranged on the transmission mechanism, the transmission rack is provided with a track above the rope clamping mechanism, and the track is provided with arc-shaped deformation parts corresponding to the two ends of the transmission mechanism; one end of the ejector rod is matched with the first clamping jaw in a pushing mode so that the first clamping jaw can be opened and closed, a first spring is matched between the ejector rod and the first clamping jaw, the other end of the ejector rod is matched with the bottom end of the push rod in a pushing mode, and the top end of the push rod is arranged in the rail in a rolling fit mode. The push rod moves up and down to push the ejector rod to move horizontally, so that the first clamping jaw is opened and closed; the rope breaking mechanism is arranged between the transmission mechanism and the seedling clamping mechanism and used for cutting off the rope, and fixed-length cutting of the rope is achieved through cooperation with the structure.

The present invention relates to a task unloading method based on resource reallocation under the connection time constraint in a vehicle network, which belongs to the field of mobile communication technology and includes the following steps: S1: establishing a traffic flow model, deducing the driving speed according to the position information of the vehicle, and calculating the connection time between vehicles based on equivalent conversion; S2: matching vehicles based on the greedy idea; S3: comprehensively representing the resource allocation of unloading decisions, channel resource allocation, newly generated tasks and tasks being calculated as a solution matrix, probabilistic mutation strategies and correction algorithms for mutation problems are proposed for different unloading decisions in the iterative process, and normalizing some unloading decisions and resource allocation to meet the constraint conditions; S4: iteratively optimizing the solution matrix based on the assimilation mutation algorithm and the microhabitat improved balance optimizer optimization algorithm. The method improves the connection stability between vehicles and the success rate of task unloading, and reduces the timeout rate and system cost.

The present disclosure relates to a device for calibrating a laser level includes a base platform, a target, and an image recognition device. The base platform is configured to support the laser level that is to be mounted on the base platform at a first position. The target is arranged at a second position of the base platform and configured to receive a laser. The image recognition device is configured to obtain images of lasers projected on the target before and after the laser level rotates a first angle, determine, based on an image recognition result of the images, positions of the lasers emitted by the laser level to determine a deviation distance, and determine whether the laser level needs to be calibrated based on the deviation distance. The deviation distance is determined by position data of the first position and the second position, and the first angle.

The invention provides a fractal theory-based deep-eutectic solvent flow battery flow channel electrode design method. The method comprises the following steps: establishing a three-dimensional flow battery positive / negative electrode model with a porous electrode domain, an inlet domain and an outlet domain; determining physical and chemical characteristic parameters of an electrolyte and a porous electrode in the model and determining boundary conditions; coupling a topological optimization algorithm based on a variable density method on the model; adding a volume force Fb in the porous electrode domain, and describing a relationship between the reversible permeability and a design variable in the porous electrode domain; establishing a three-dimensional flow battery positive electrode / negative electrode topological optimization model based on fluid flow electrochemical reaction; according to the optimization model, a three-dimensional topological optimization solution program is selected for analysis and solution; carrying out convergence judgment, and outputting a flow channel electrode integrated structure based on fluid flow electrochemical reaction topological optimization; and the hierarchical structure form of the flow channel in the electrode is simplified, and the regular tree-shaped flow channel electrode integrated structure easy to process and manufacture is obtained.

The present invention provides a nonlinear characteristic waveguide device and method based on the R zone of a component, and aims at the detection and evaluation of the R zone of a complex-shaped component of a composite material, through a single-mode narrow-band flexible electromagnetic ultrasonic transducer for exciting characteristic waveguide, and a multi-mode broadband flexible electromagnetic ultrasonic transducer for receiving the nonlinear effect of the characteristic waveguide, to achieve rapid and long-distance detection and evaluation of the stress in the unreachable R zone. The present invention adopts non-contact flexible electromagnetic ultrasonic detection technology, excites the characteristic waveguide mode according to the geometric size of the structural area, performs data processing on the received signal to obtain the relative nonlinear parameters in the structural area, that is, uses the relative nonlinear parameters as coefficient factors to achieve effective characterization of the overall stress of the structural area, increases convenience, and improves detection efficiency.

The present application relates to air conditioning technical field, especially a kind of multi-branch networking system and its communication method, system includes cloud platform and multiple branch subsystems;Branch subsystem includes control signal sending device, not networking device and at least two to be networked equipment;Control signal sending device is electrically connected not networking device and to be networked equipment by control line, transmits low-frequency control signal;Branch subsystem further includes the same number of networking communication module as to be networked equipment;Networking communication module and to be networked equipment one-to-one correspondence electrically connected, networking communication module is electrically connected with control line, transmits high-frequency communication signal;Wherein one networking communication module is as main communication module and is communicated with cloud platform connection;Solved the problem that multi-branch system data interconnection construction is difficult and system cost is high.

A cellular mechanical force detection apparatus (1), comprising: a base (11), and a micro-column array formed by a plurality of micro-columns (12) that are provided on the base (11) and can be deformed by means of the cellular mechanical force. The top of the micro-column (12) or the upper portion of the column surface has a light reflecting layer (13). Moreover, a detection system, a detection method, and a preparing method are provided. The solution has the advantages of high throughput, low cost, single cell resolution, real-time monitoring, high sensitivity, capability of simulating a cellular microenvironment, capability of simulating components and forms of extracellular matrixes, and the like, and can cope with richer technical demand scenarios.

The present application provides a photovoltaic power generation system and a control method therefor, and a power converter. The control method for the photovoltaic power generation system comprises: first obtaining the MLPE state characterization information of a photovoltaic string, and then determining, according to the MLPE state characterization information, whether there is at least one MLPE device that is not in a normal output state in the photovoltaic string; and if there is at least one MLPE device that is not in the normal output state in the photovoltaic string, controlling the current of the corresponding string to be less than a preset threshold. Therefore, the power consumption of the corresponding MLPE device in a bypass operation state is reduced, so that the MLPE device can use a bypass diode having smaller power capacity and a heat dissipation measure with a lower heat dissipation requirement during design, and the system cost is reduced.