13 results about "High frequency electromagnetic radiation" patented technology

The invention relates to the technical field of fire early warning, and particularly discloses a fire-fighting electrical fire early warning method and system based on the Internet of Things, and the method comprises the steps: configuring an edge computing gateway, and collecting a current waveform signal and a high-frequency electromagnetic radiation signal of an electrical loop based on the edge computing gateway; extracting harmonic characteristics and electromagnetic radiation characteristics; constructing a risk value prediction and propagation model based on the graph neural network model according to the power grid topological structure, generating a data packet when the coupling relationship between the harmonic characteristics and the electromagnetic radiation characteristics meets a joint triggering condition, inputting the data packet into the risk value prediction and propagation model, and transmitting the data packet to the power grid. A dynamic risk value and a fault source position are output based on a risk value prediction and propagation model, through bimodal acquisition, electrical fire hazards can be found in an early stage, real-time feature extraction is performed by using an edge computing gateway, the data transmission amount is reduced, modeling is performed on power grid topology through a graph neural network model, a fault propagation path can be accurately predicted, and the fault propagation efficiency is improved. And the early warning precision is improved.

The utility model discloses a high-frequency electromagnetic radiation monitor, and relates to the technical field of electromagnetic radiation monitoring. The high-frequency radiation monitor comprises a high-frequency radiation monitor body, an expansion fixing frame is fixedly arranged at the bottom end of the high-frequency radiation monitor body, an overturning frame is rotatably arranged on the expansion fixing frame, a pushing overturning assembly used in cooperation with the overturning frame is arranged in the expansion fixing frame, and an overturning protection assembly is arranged on the overturning frame. A photovoltaic panel is arranged in the turnover protection assembly; according to the utility model, by arranging the pushing overturning assembly, the pushing overturning assembly drives the overturning frame to overturn with the overturning shaft as the axis, so that the overturning frame is overturned and unfolded to drive the photovoltaic panel to overturn synchronously, and the photovoltaic panel is convenient to store and unfold; and by arranging the foldable photovoltaic panel capable of being stored, light energy is converted into electric energy to achieve a continuous function on the high-frequency radiation monitor body, so that the cruising ability is improved.

The invention relates to the technical field of electronic component measurement, in particular to an electronic component performance parameter measurement method based on a sensor. The method comprises the steps of obtaining operation information of an electronic component production line and a motion instruction of a servo motor; according to the operation information and the motion instruction of the servo motor, determining a time period when the servo motor generates high-frequency electromagnetic radiation; according to the time period when the servo motor generates high-frequency electromagnetic radiation, the working time sequence of the electronic component production line is adjusted, and the pure measurement time period when the electromagnetic radiation of the servo motor is in the minimum state is determined; according to the pure measurement time period when the electromagnetic radiation of the servo motor is in the minimum state, data acquisition of performance parameters is carried out on the electronic component, and the electrical performance parameters of the electronic component are obtained. The objective of the invention is to solve the problem of inaccurate measurement results caused by interference of measurement data when performance parameters of an electronic component are measured by an existing parameter measurement method.

The invention relates to the field of application of electronic detonators, in particular to a simple device and method for improving the explosion radiation resistance of an electronic detonator, the simple device for improving the explosion radiation resistance of the electronic detonator comprises a cylindrical metal cap, the top surface of the metal cap is provided with a receding hole, and the side wall and the top surface of the metal cap are provided with a continuous notch. The method comprises the following steps: 1, buckling a metal cap on an injection plug of the electronic detonator; and 2, winding and wrapping the electronic detonator by using a metal foil adhesive tape, and fixing the metal cap. According to the method for improving the explosion radiation resistance of the electronic detonator, an electromagnetic leakage channel of the electronic detonator can be reduced, high-frequency electromagnetic radiation is effectively shielded by coating the high-conductivity metal layer, and the reliability of the electronic detonator in an explosion radiation environment is improved.

Method for determining the layer thicknesses of a sample with a known plurality N of superimposed layers S i , with i = 1, 2, 3, ..., N, with the steps: a) Generating pulses of electromagnetic high-frequency radiation with a predetermined frequency bandwidth, b) Irradiating the sample with electromagnetic high-frequency radiation and c) Time-resolved measurement of the electric field E P (t) the electromagnetic radiofrequency radiation reflected by or transmitted through the sample, d) Selecting a layer thickness d i , an absorption index k i and a refractive index n i for each layer S i , with i = 1, 2, 3, ..., N, e) Calculating a time-dependent electric field E M(t) for the electromagnetic high-frequency radiation reflected by or transmitted through the sample using a model, wherein the model defines a time-dependent electric field E according to the number N+1 interfaces between the measurement environment and the sample, as well as between the individual layers. j (t), with j = 0, 1, 2, 3, ..., N, taken into account, where the electric fields E j (t) depending on the layer thicknesses d i , the absorption indices k, which are assumed to be constant over the frequency bandwidth of the electromagnetic high-frequency radiation used i and the refractive indices n, which are assumed to be constant over the frequency bandwidth of the electromagnetic high-frequency radiation used. i to the time-dependent electric field E M (t) are added, f) Comparing the calculated electric field E M (t) with the detected electric field E P(t) g) when there is a deviation Q between the calculated electric field E M (t) and the detected electric field E P (t) is greater than a predetermined tolerance T, the layer thicknesses d i , the refractive indices n i and the absorption indices k i as long as the deviation Q is varied and steps e) to g) are repeated until the deviation Q is smaller than the tolerance T, and h) Providing the layer thicknesses d i as a result of the layer thickness determination, characterized in that initially for step d) and for a predetermined number of L repetitions of steps e) to g) the absorption index k i is selected from a range of values ​​that is small compared to the expected range of values ​​that the absorption index k represents. i for the respective shift S i a sample can assume and which is in relation to the maximum expected absorption index k ifor the respective layer includes small absorption indices.

A high frequency electromagnetic radiation generation device is disclosed that includes a high voltage input, a nonlinear transmission line, an antenna, and a pulse recirculating circuit. In some embodiments, the high voltage input may be configured to receive electrical pulses having a first peak voltage that is greater than 5 kV, and / or may be electrically coupled with the nonlinear transmission line. The antenna may be electrically coupled with the nonlinear transmission line and / or may radiate electromagnetic radiation at a frequency greater than 100 MHz about a voltage greater than 5 kV. The pulse recirculating may be electrically coupled with the high voltage input and the antenna. The pulse recirculating circuit may include a diode; a low pass filter; and a delay line. In some embodiments, unradiated energy from the antenna is directed through the pulse recirculating circuit to the nonlinear transmission line with a delay of less than 100 ns.

The utility model discloses a high-precision parallel-plate capacitive sensor structure, which belongs to the field of parallel-plate capacitive sensors and comprises a bottom plate, a sensor assembly is arranged on the bottom plate and consists of an upper polar plate and a lower polar plate, the upper polar plate and the lower polar plate are fixedly mounted on two insulating support columns respectively, and a distance adjusting mechanism is mounted on the bottom plate. The bottom plate is further provided with a shielding mechanism, the shielding mechanism comprises a permalloy shielding cover, a copper net is fixed in the permalloy shielding cover, a rectangular groove is formed in the top of the bottom plate, and the permalloy shielding cover and the copper net are installed in the rectangular groove in an embedded mode. According to the utility model, through the arrangement of the shielding mechanism, the effect of efficiently shielding various electromagnetic interferences is achieved, a double-layer structure formed by the permalloy shielding cover and the internal copper net can shield a low-frequency magnetic field and high-frequency electromagnetic radiation respectively, and permalloy has a good magnetic conduction shielding effect on the low-frequency magnetic field.

The invention relates to the technical field of ring main units, discloses an electromagnetic shielding and heat dissipation integrated ring main unit, and aims to solve the problems of interference of external electromagnetism on electrical devices in the ring main unit and waste caused by direct discharge of environment-friendly gas. Through the arrangement of the heat dissipation mechanism, when the temperature in the electrical cavity reaches a certain value, the upper piston plates in the left cavity and the right cavity move in opposite directions, so that environment-friendly gas with certain heat in the electrical cavity is sucked into the heat dissipation cavity, low-temperature environment-friendly gas in the heat dissipation cavity enters the electrical cavity, and through the action, the heat dissipation efficiency is improved. And meanwhile, the cabinet body is made of stainless steel plates, and the stainless steel plates are high in conductivity and can generate strong reflection loss, so that external high-frequency electromagnetic radiation is effectively blocked, and an electromagnetic shielding function is further realized.

This invention discloses a method and system for detecting fault arcs in a distribution box, comprising: simultaneously acquiring the current signal of the target line inside the distribution box and the 30MHz-300MHz high-frequency electromagnetic signal radiated from the internal space; extracting the peak-to-peak ratio and pulse density of the electromagnetic signal, and the gradient abrupt change, zero-rest phenomenon enhancement, and high-frequency noise energy ratio of the current signal; fusing the two types of features into a joint feature vector, inputting it into a fault arc classification model pre-trained based on a deep forest algorithm; and combining an adaptive dynamic threshold to determine whether a fault arc has occurred. This invention creatively employs feature-level collaborative analysis of high-frequency electromagnetic radiation and current waveforms, achieving dual capture and cross-validation of the essential characteristics of fault arcs. It has the advantages of fast response, high reliability, strong environmental adaptability, and ease of deployment in embedded environments within distribution boxes, effectively solving the problems of high false alarm rate and insensitivity to low-energy arcs in traditional methods.

The utility model discloses a shielding anti -interference's flywheel converter cabinet body, through the division structure divides the cabinet body for power area and control area, realizes two area physical isolation, blocks the cross -region electromagnetic coupling while promoting space utilization. The division structure adopts the metal partition made of aluminium -zinc coated sheet or galvanized steel sheet, forms one -level area shielding, effectively absorbs the low -frequency magnetic field interference of strong electric component of power area, is equipped with at least one pull -out box in control area, and the box body shell adopts aviation aluminium alloy material and is equipped with the conductive coating in the joint, forms two -level box shielding, forms strong reflection to high -frequency electromagnetic radiation, realizes full -band electromagnetic protection. Power area and control area pass through the layout optimization component installation of division, and the pull -out box body design is convenient for maintaining, and shielding layer does not need to dismantle, and the cabinet frame, the plate assembly etc. adopt aluminium -zinc coated sheet or aviation aluminium alloy and are connected through riveting process, and cooperate directional threading hole structure, and further strengthen the anti -interference effect.

The invention discloses an energy storage battery PACK partial discharge detection method, system and device and a storage medium, and relates to the technical field of energy storage battery insulation detection and partial discharge monitoring. The method comprises the following steps: applying a direct-current voltage to an energy storage battery PACK, and synchronously acquiring a multi-mode signal; extracting a multi-modal feature capable of reflecting partial discharge from the multi-modal signal; and splicing the multi-modal features and inputting the spliced multi-modal features into an intelligent judgment model, and outputting a partial discharge state recognition result by the intelligent judgment model. Multi-dimensional sensing of partial discharge signals is achieved through infrared thermal image signals, Raman spectrum signals, ultrahigh-frequency electromagnetic radiation signals and acoustic emission mechanical shock wave signals, it is ensured that the discharge signals can still be stably captured in an energy storage battery PACK of a complex structure, and the partial discharge probability and the grading result are output in cooperation with an intelligent judgment model. Accurate quantification of discharge severity is realized, and data support is provided for insulation reliability evaluation.

The utility model provides a multi-layer structure of a broadband anti-electromagnetic radiation automobile foot mat, which comprises a flannelette layer, a first low-frequency electromagnetic radiation protection layer, a high-frequency electromagnetic radiation protection layer, a second low-frequency electromagnetic radiation protection layer and a fleece stab cloth layer which are sequentially stacked, and the layers are adhered through polyurethane pressure-sensitive adhesive or acrylic acid pressure-sensitive adhesive. The high-frequency electromagnetic radiation protection layer and the low-frequency electromagnetic radiation protection layer have a synergistic effect, so that electromagnetic radiation from low frequency to high frequency can be effectively protected, the electromagnetic radiation protection range in an automobile is widened, and the electromagnetic safety of the environment in the automobile is remarkably improved. Compared with the traditional anti-radiation technology, the material has the advantages of wide coverage frequency band, convenience in installation, lasting protection and the like, and is suitable for any vehicle type such as an extended-range electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a traditional oil vehicle and the like.

The application relates to the technical field of ring network cabinets, and discloses a ring network cabinet integrating electromagnetic shielding and heat dissipation, which aims to solve the problems of interference of external electromagnetism on electrical devices in the ring network cabinet and waste caused by direct discharge of environment-friendly gas. The heat dissipation mechanism is arranged, when the temperature in the electrical cavity reaches a certain value, the left and right cavity bodies are moved in opposite directions through the upper piston plates, the environment-friendly gas with a certain heat in the electrical cavity is drawn into the heat dissipation cavity, and the low-temperature environment-friendly gas in the heat dissipation cavity enters the electrical cavity. Through the action, heat dissipation of the electrical devices is realized, meanwhile, the cabinet body is made of stainless steel plates, the stainless steel plates have high conductivity, can generate strong reflection loss, effectively block external high-frequency electromagnetic radiation, and realize the electromagnetic shielding function.