13 results about "Medium wave" patented technology

The utility model provides an automatic tunable middle wave sky tuning system adapting to complex environment, including transmitting system, excitation source, signal switching system, radio frequency sampling system, impedance sampling system, middle wave sky tuning network, middle wave antenna and automatic tuning system. The utility model discloses an automatic tunable middle wave sky tuning system adapting to complex environment reduces the signal attenuation between the machine room and the sky tuning room, reduces the influence (such as electromagnetic interference, temperature and humidity change) of environmental factors to the tuning accuracy simultaneously, adapts to complex environment, and automatically tunes the out-of-tune middle wave sky tuning network under complex environment, realizes the sky tuning system adaptation again, reaches the reliability of middle wave sky tuning system power transmission, and ensures the reliable operation of transmitting system.

The application discloses a kind of shale oil reservoir's attenuation-elastic-electricity combined modeling and parameter prediction method, belong to geophysical exploration and oil and gas reservoir evaluation technical field.First, obtain mineral components, pore structure and elastic-attenuation-electricity full-dimensional experimental data through core experiment, determine attenuation and resistivity as high sensitivity parameter after sensitivity analysis;Again, based on Hashin-Shtrikman boundary, differential equivalent medium theory, triple-pore medium wave propagation equation, construct the acoustic and electrical rock physics model of completely consistent micro-pore structure;Finally, establish longitudinal wave impedance-attenuation coefficient-resistivity three-dimensional joint rock physics chart, after multi-band correction, simultaneously quantitative prediction reservoir porosity, shale content and fracture porosity.The application breaks through the limitation of conventional acoustic-electricity combined model, significantly reduces the multi-solution of reservoir parameter prediction, and is suitable for fine evaluation of various shale oil tight reservoirs.

This invention discloses a wide-band, large-area infrared imaging lens covering short-wave and mid-wave bands, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object plane to the image plane; the first lens is a biconvex lens with positive refractive power; the second lens is a biconcave lens with negative refractive power; the third lens is a plano-concave lens with negative refractive power; the fourth lens is a convex-concave lens with positive refractive power; the fifth lens is a convex-concave lens with negative refractive power; the sixth lens is a biconvex lens with positive refractive power; and the seventh lens is a convex-plano lens with positive refractive power. This wide-band, large-area infrared imaging lens covering short-wave and mid-wave bands is suitable for the 1.5-5.5µm band, can be matched with high-resolution 1280x1024 (10µm) infrared detectors, has high optical throughput, can be used for imaging objects at greater distances, and has a compact structure.

The application relates to the technical field of antenna matching and tuning devices, in particular to a medium wave antenna matching assembly based on double helix inductors, which comprises a shell, a coil set arranged in the shell, a movable magnetic core rod, a lead screw, a variable capacitor, a mounting plate, a coarse tuning knob, a fine tuning knob, an antenna interface and a speed reducer; wherein an operation table is arranged on the shell, the coarse tuning knob and the fine tuning knob are arranged on the operation table; the coil set comprises a first double helix inductor, the magnetic core rod is arranged along the axial direction of the first double helix inductor and can axially move relative to the first double helix inductor; the lead screw is arranged in the shell and is in transmission connection with the magnetic core rod, the coarse tuning knob is in transmission connection with the lead screw so as to drive the magnetic core rod to perform coarse tuning; the variable capacitor is arranged on the mounting plate, the fine tuning knob is in transmission connection with the variable capacitor through the speed reducer so as to perform fine tuning on the variable capacitor; and the antenna interface is arranged on the shell and is electrically connected with the first double helix inductor and the variable capacitor to form an antenna matching network.

This application relates to an integrated monitoring and control system for a medium-wave transmitter. It mainly includes a core control unit and an industrial control computer, dual exciters, a rack interface board, an RF sampling module, and a directional coupler, all communicatively connected to the core control unit. The core control unit receives control commands from the industrial control computer via a first serial bus, and, combined with its own monitoring data, sends control commands to the dual exciters and the rack interface board via a second serial bus. Simultaneously, it receives sampling data from the dual exciters via a data stream bus to verify the control effect. The core control unit uses a multi-stage voltage regulation topology to convert a single input voltage into multiple stable voltages, providing adaptive power to each module. This application can effectively improve the transmitter's integration, interface simplicity, operational reliability, maintenance convenience, and intelligence level.

The utility model discloses a kind of middle wave broadcast transmitting antennas with protection structure, including main body, mounting mechanism, positioning mechanism and cooperation mechanism, the mounting mechanism includes mounting bracket and chassis, the positioning mechanism includes connecting piece and clamping piece, the cooperation mechanism includes protective piece and sealing gasket, under the mutual cooperation of above mechanism, antenna main body is fixed on the chassis in this device, can ensure the structural stability of antenna, avoid displacement or damage due to external force (such as wind, earthquake etc.), so as to ensure the normal work of antenna, in addition, the locking piece and clamping piece of this device can effectively prevent antenna from loosening or disassembling when subjected to external force, enhance the stability of antenna, especially when encountering strong wind or other vibration.

The utility model discloses a novel medium wave transmitter benefit coil fixed bolster. Include: coil fixed cylinder, coil fixed cylinder is polytetrafluoroethylene cylinder body, and the outer cylinder wall is evenly provided with a plurality of coil fixed grooves along the extension direction, and the one end to benefit coil board is evenly provided with a plurality of mounting holes, a plurality of mounting holes correspond with the connecting hole of benefit coil board, and the mounting hole is provided with damping connection subassembly, and the connection with connecting hole is realized through damping connection subassembly, damping connection subassembly includes connecting piece and damping washer, and damping washer is located between benefit coil board and coil fixed cylinder, and connecting piece connects benefit coil board, damping washer and coil fixed cylinder in proper order. The utility model is fixed through coil fixed groove, avoids the slip of coil, sets up damping connection subassembly between coil fixed cylinder and benefit coil board, absorbs the mechanical vibration caused by power output fluctuation, avoids the frequent displacement of coil to appear vibration, leads to the problem of signal transmission efficiency decline.

1. The name of the design product: medium wave broadcast transmitting antenna. 2. The use of the design product: device for receiving broadcast signals. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The present application provides a metallurgical gas remote sensing classification and identification method and system based on medium and long wave infrared cooperation, belonging to the technical field of metallurgical gas classification and identification. The present application first adopts a dual-band cooperative detection strategy, uses a medium wave analysis window as a detection carbon monoxide leakage trigger signal and a long wave analysis window as a detection methane leakage trigger signal to accurately measure the leakage of carbon monoxide and methane, secondly, obtains the concentration of carbon monoxide and methane through inversion, has higher radiation contrast and detection sensitivity, and finally identifies the type of metallurgical gas through a decision tree model, so that the identification result is simpler and more accurate, and realizes the rapid discovery of leakage and accurate identification of gas types under the conditions of long-distance, non-contact and passive.

1. Name of the product in this design: Thermal Infrared Microscopic Analyzer (Medium Wave Type). 2. Purpose of this design: To detect infrared energy and generate thermal images and heat values. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present disclosure relates to the technical field of medium wave rebroadcast equipment fault processing, and particularly relates to a model-based fault solution generation method and device, the method comprising: in response to monitoring that a medium wave rebroadcast equipment has a fault, collecting fault-related data, determining a fault type based on the fault-related data; calling a preset fault strategy model to match the fault type, obtaining a fault processing strategy; the fault strategy model contains a maintenance log, an equipment manual, and relevant materials for processing medium wave rebroadcast fault problems, and the technical materials in the fault strategy model are stored in categories according to a reception system, a program transmission system, a transmission system, a power distribution system, and an automation system; based on the fault processing strategy obtained by matching the fault type based on the fault strategy model, a processing object is determined in combination with a preset work cooperation relationship; early warning information containing the fault type and the fault processing strategy is generated, and the early warning information is sent to the processing object.

The application discloses a dual-mode medium wave transmitting device and method compatible with analog and digital modulation, and the medium wave transmitting device comprises a power supply and indication unit, a core oscillation unit, a biasing and control unit and a signal input unit; the core oscillation unit comprises a triode Q1, a medium wave magnetic rod antenna coil H1, a first feedback capacitor C2 and a second feedback capacitor C1, wherein the medium wave magnetic rod antenna coil H1, the first feedback capacitor C2 and the second feedback capacitor C1 constitute an inductive three-point oscillation loop; the biasing and control unit comprises a base biasing resistor R1, a two-way switching switch SW1, a current-limiting resistor R2 and an external control interface, the triode Q1 is connected with the two-way switching switch SW1, a first fixed end of the two-way switching switch SW1 is connected with a power supply VCC, and a second fixed end is connected with the external control interface through the current-limiting resistor R2. The device can meet the requirements of radio analog modulation principle demonstration and digital communication experiment, and greatly improves the practicability and teaching value of the device.