7results about How to "Directional" patented technology

This invention discloses a screening method for isolated DC-DC converters for high-voltage power supplies in electric vehicles. It comprehensively considers the impact of switching frequency on isolated DC-DC converters for high-voltage power supplies, and evaluates five indicators affected by switching frequency—voltage ripple, efficiency, temperature rise, EMC, and volume—using a weighted function, and then screens them to select isolated DC-DC converters with more balanced performance across the five indicators as the isolated DC-DC converters for high-voltage power supplies in electric vehicles.

An antenna structure, an electronic device and a wireless network system, relate to the technical field of antennas. The antenna structure is characterized in that a medium plate and a metal bottom plate are spaced apart by a first preset distance; a first feeding port and a patch antenna array are located on a first surface of the medium plate, and a second feeding port is located on a second surface of the medium plate, the second surface being opposite to the first surface; the patch antenna array comprises four patch antennas, the four patch antennas being arranged in two rows and two columns, a feeding structure being included between the two patch antennas in each row, and a feeding structure being included between the two patch antennas in each column; the feeding structure between the two patch antennas in each column is connected to the first feeding port, so that the four patch antennas all generate polarization in a first direction; the feeding structure between the two patch antennas in each row is connected to the second feeding port, so that the four patch antennas all generate polarization in a second direction, the first direction being orthogonal to the second direction. The antenna structure has a simple structure and a high directional gain.

This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.

The application provides a robot form optimization method and device, and relates to the technical field of artificial intelligence. The method comprises the following steps: obtaining a plurality of first form files to be optimized; wherein the first form file is an extensible markup language file; performing performance analysis on each first form file to obtain a text description corresponding to each first form file; wherein the text description indicates at least one of the advantages, disadvantages and improvement suggestions of the first form file; inputting at least one of the text description and a preset operation instruction and the first form file into a preset coding model to output at least one second form file. Through the generation of the text description and the construction of the preset operation instruction, the first form file in the form of the extensible markup language file can be directly optimized by using the preset coding model, and compared with the existing optimization mode by using an image model, the form optimization is unconstrained, efficient and directional.

The application relates to a self-adjusting bandwidth microstrip Yagi rectifier antenna and application, and belongs to the field of Internet of Things sensors. The application can be applied to Internet of Things sensors, and comprises a microstrip Yagi antenna and a rectifier. The microstrip Yagi antenna comprises a first substrate, an active oscillator, a reflector and a directive antenna. The rectifier comprises a microstrip line and an impedance changer. The application realizes self-power supply and saves electric energy. Meanwhile, the combination of a resistance voltage dividing circuit and a MOS tube is used. The combination of the DC voltage voltage dividing by the resistance voltage dividing circuit and the MOS tube controls the opening and closing of the directive antenna, various opening and closing combinations are formed, the bandwidth size is adjusted, and the problems that a traditional sensor needs active power supply and the communication bandwidth is narrow and unadjustable are solved.

This application relates to the field of lighting control technology, and more particularly to a vehicle lighting control method and system. The proposed solution involves acquiring dynamic information from multiple target objects to determine their motion trends and behavioral intentions, and mapping these intentions to a direction-sensitive objective function. Based on the motion trends, orientation alignment and spatial scaling are performed within a local reference coordinate system to construct a behavioral potential field model. Multiple behavioral potential field models are spatially superimposed to generate a spatially continuous illuminance weight map, which is then mapped to the lighting group to achieve point-to-point brightness adjustment. This application improves the accuracy of lighting response in complex traffic scenarios, avoids lighting interference, and ensures driving safety.

The application discloses a kind of transmission bender crystal spectrometer efficiency calibration method, device and electronic equipment, belong to ray spectrometer technical field.Transmission bender crystal spectrometer efficiency calibration method includes: by reference spectrometer to light source spectrometer to obtain reference energy spectrum distribution curve chart, and according to reference energy spectrum distribution curve chart determine target spectral line and target spectral line corresponding target reference signal intensity;By target spectrometer to light source spectrometer to obtain target energy spectrum distribution curve chart, and according to target energy spectrum distribution curve chart determine target spectral line corresponding target signal intensity;According to target reference signal intensity and target signal intensity obtain target spectrometer target efficiency.The method is simple and can quickly calibrate target efficiency, so that subsequent users can directly infer the intensity of the required light source by the target efficiency of the target spectrometer and the intensity of the required spectral line when using the target spectrometer to obtain the required spectral line, improving the speed and efficiency of light source adjustment.