13results about How to "Reduce system cost" patented technology

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.

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 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 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 invention discloses a lightweight garbage detection method and system based on an improved YOLOv11s model, and the method comprises the following steps: S1, only employing a monocular camera, and obtaining the RGB image data of a road through the monocular camera; s2, cutting the acquired image data, cutting off the upper half part of the road image, and keeping key information related to a ground area below the image; and S3, calling an improved YOLOv11s network model, inputting the preprocessed image into the network model, then starting a detection code to carry out image reasoning detection, and drawing a detection result on the image to obtain result image data containing junk bounding box coordinates, junk categories and detection confidence information. According to the method, garbage in complex environments such as urban roads, green belts and community scenes can be efficiently detected and recognized in real time at low cost, and particularly, the detection performance of small-size target garbage is excellent.

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.

The application discloses a process for preparing epichlorohydrin by directly oxidizing chloropropene, which comprises the following steps: feeding a homogeneous mixture containing chloropropene, hydrogen peroxide, polyhydric alcohol and non-ionic surfactant into a continuous reactor to perform reaction, and obtaining a product containing epichlorohydrin. Compared with the traditional method, the reaction byproduct is less, the product after hydrogen peroxide reaction is water, the non-ionic surfactant and polyhydric alcohol are added to promote the mixing of the organic phase and the aqueous phase into a homogeneous phase, improve the selectivity, a large amount of solvent does not need to be added, solvent evaporation recovery and other processes are avoided, the process is energy-saving and environment-friendly, the equipment process is simple, the yield and selectivity are high, the process is suitable for large-scale industrial production, has great economic benefits, solvent evaporation and recovery are not needed, is beneficial to industrial production amplification, the equipment maintenance cost is low, the system cost is relatively low, the environmental pollution is small, the operation is simple, the process is easy to repeat, and epichlorohydrin can be efficiently produced.