10 results about "Electromagnetic field coupling" patented technology

This invention discloses a method and system for detecting partial discharge in the main transformer of a new energy power plant step-up substation, belonging to the field of power equipment testing technology. The method includes: establishing an electromagnetic field coupling model of the main transformer's operating conditions; acquiring real-time operating condition data, characteristic gas concentration signals, and multi-mode detection signals of the main transformer in the step-up substation; constructing a multi-mode signal feature vector; determining the first probability of partial discharge in the main transformer; determining the second probability of partial discharge in the main transformer; performing deep partial discharge diagnosis under operating condition fluctuation-sensitive fusion; and obtaining the diagnostic results of the main transformer's partial discharge. This invention solves the technical problems of existing technologies where the detection of partial discharge in the main transformer of a new energy power plant step-up substation is easily affected by operating condition fluctuations and has a single detection dimension, resulting in insufficient accuracy and stability of diagnostic results. It achieves accurate detection and multi-dimensional diagnosis of partial discharge in the main transformer of a new energy power plant step-up substation, improving the accuracy and stability of partial discharge detection.

This application discloses a solid-state microwave source output power testing device, relating to the field of electrical variable testing. The device includes a power supply module, a mechanical adjustment component, and a light-emitting indicator component. The power supply module supplies power to the solid-state microwave source; the mechanical adjustment component adjusts the output power of the solid-state microwave source; and the light-emitting indicator component detects the output power of the solid-state microwave source. This application uses a mechanical method to adjust the output power of the solid-state microwave source and employs electromagnetic field coupling + light emission to detect the output power. This enables intuitive qualitative detection of the solid-state microwave source output power, has a simple structure and low cost, and the mechanical adjustment component and the light-emitting indicator component have low requirements for the testing environment.

The application discloses a kind of three-frequency co-aperture multi-beam antenna design method, device and system, and the forbidden area of three-frequency band radiator and lamination constraint are extracted by electromagnetic field coupling simulation, and initial layout condition is established;Subsequently, space topology optimization is carried out to determine the radiator layout and feed network structure, then polarization direction and excitation phase are jointly optimized to realize frequency band matching, finally, beamforming parameters are generated by multi-objective optimization, and finally, a three-dimensional model of co-aperture integration is constructed, so as to realize the collaborative design and optimization of three-frequency band antenna in limited space.The application can realize the collaborative improvement of multi-band high isolation, low coupling interference and multi-beam dynamic shaping capability.

This disclosure provides an antenna device and electronic device capable of miniaturization and achieving the desired radiation efficiency. The antenna device (100) of this disclosure includes: a substrate (20); and a first antenna and a second antenna formed on the substrate (20). A grounding region (20b) includes: a region (20b1) having a length (D2) in the Y direction orthogonal to the X direction; and a region (20b2) having a length (D3) longer than the length (D2). In the case where the substrate (20) is divided in the X direction by an electromagnetic field coupling element (10) into a first side (20c) for the formation of the first antenna element (41) and the second antenna element (42) and a second side (20d) opposite to the first side (20c), the region (20b2) is provided on the second side (20d) of the substrate (20), and a cable (40) connecting the power supply circuit (30) to the first antenna or the second antenna is fixed to the region (20b2).

Provided is a laminated electronic component capable of suppressing electromagnetic field coupling between a plurality of inductors and capable of being miniaturized. The laminated electronic component includes a laminate and first to third inductors. An area of a region obtained by vertically projecting a first space including a first axis and surrounded by the first inductor to an XZ plane is larger than an area of a region obtained by vertically projecting a second space including a second axis and surrounded by the second inductor to a YZ plane. The third inductor is disposed such that a third axis does not cross the first space and crosses the second space.

The application discloses a non-metallic electric energy metering box with one-code dual-purpose anti-theft electricity verification, which comprises a non-metallic box body, a one-code dual-purpose verification module, a passive external monitoring unit, a physical locking isolation unit and an active reverse verification unit. The box body is made of insulating composite material, and a distributed electromagnetic coupling array is pre-embedded in the wall. The unique identity code of the verification module is used as a legal authentication certificate of the equipment in the first mode, and is used as an anti-theft electricity situation awareness key after being transformed by an algorithm in the second mode. The passive external monitoring unit passively collects running state characteristics through non-contact electromagnetic field coupling in the independent domain outside the box body. The physical locking isolation unit triggers irreversible locking when the characteristics deviate from the threshold. The active reverse verification unit sends a time-varying sequence challenge from the metering end to the power consumption end after locking. The application solves the technical problem of anti-theft electricity of the non-metallic electric energy metering box.

This invention provides a millimeter-wave broadband packaged antenna structure, comprising a packaging substrate composed of alternating stacked metal layers and dielectric layers. Multiple metal layers have vertically aligned center-gap regions. A driving patch, a microstrip line matching segment, and a stripline are sequentially connected and aligned along the signal transmission path. A parasitic patch, parallel to and vertically aligned with the driving patch, is located in an adjacent metal layer directly above it. These two patches are not directly electrically connected but are fed through electromagnetic field coupling, allowing the driving patch and parasitic patch to operate at similar but different resonant frequencies, forming a dual-resonance operating mode. This effectively expands the antenna impedance bandwidth. Stripline shielding holes are provided on both sides of the stripline, and antenna shielding holes are arranged around the edge of the gap regions to suppress signal leakage and cavity resonance. This invention replaces the traditional coplanar or slotted method with a vertically stacked coupling structure, achieving antenna miniaturization while significantly improving bandwidth, and enhancing the design freedom of impedance matching through the microstrip line matching segment.

This invention provides a high-coupling-efficiency microstrip antenna and a quantum measurement device based on NV color centers. It belongs to the field of NV color center technology. The microstrip antenna includes: a dielectric substrate, a ground plane disposed on a first surface of the dielectric substrate, a radiating patch disposed on a second surface of the dielectric substrate, a feeding structure, and an NV color center diamond. The radiating patch includes an outer radiating patch and an inner radiating patch nested together. The outer radiating patch surrounds an outer region, and the inner radiating patch is located within the outer region, with a gap between them. The inner radiating patch surrounds an inner region. The NV color center diamond is fixed to the second surface of the dielectric substrate and located within the inner region. One end of the feeding structure is connected to the outer radiating patch. This microstrip antenna achieves precise matching with the resonant frequency of the NV color center, improving electromagnetic field coupling efficiency, reducing signal reflection and transmission loss, and enhancing the stability and sensitivity of the quantum measurement system.

A double resonance transformer uses a primary winding, a first secondary winding, and a second secondary winding to perform voltage conversion using an electromagnetic induction phenomenon based on a winding ratio of the primary winding, the first secondary winding, and the second secondary winding in a rectification operation period that is a conduction period of a first rectification element or a second rectification element. The double resonance transformer uses a primary-side resonance circuit and a first secondary-side resonance circuit or a second secondary-side resonance circuit to perform power transfer using an electromagnetic field resonance phenomenon based on the formation of electromagnetic field coupling between the primary-side resonance circuit and the first secondary-side resonance circuit or the second secondary-side resonance circuit in a rectification stop period in which both the first rectification element and the second rectification element are non-conductive. Due to the electromagnetic field resonance phenomenon, the double resonance transformer 30 holds, as resonance energy, electromagnetic field energy not involved in the power transfer in the primary-side resonance circuit and the first secondary-side resonance circuit or the second secondary-side resonance circuit. The first secondary-side resonance circuit and the second secondary-side resonance circuit start resonance operations at the start of the rectification stop period, end the resonance operation at the end of the rectification stop period, alternately switch the resonance operations of the first secondary-side resonance circuit and the second secondary-side resonance circuit over time, and supply the resonance energy to a load connected to a secondary-side smoothing circuit.

This invention discloses a high-speed motor speed detection method based on MEMS microcoils, relating to the field of high-speed motor speed detection. The method includes: non-contactly placing at least one MEMS microcoil sensor at a key electromagnetic field coupling position on the high-speed motor body or drive circuit; the MEMS microcoil sensor outputting a raw induced voltage signal; conditioning the raw induced voltage signal; using an analog-to-digital converter to perform high-speed synchronous sampling of the conditioned signal to obtain a digital signal sequence; extracting the speed characteristic frequency; calculating the real-time motor speed based on the speed characteristic frequency and preset motor parameters through a preset mapping relationship, and outputting the calculation result. This invention employs a miniaturized coil sensor based on MEMS technology, combined with intelligent signal processing algorithms, to achieve high-precision, high-response speed measurement in ultra-high-speed scenarios.