124 results about "Medium wave" patented technology

The invention relates to a dual-waveband medium-long wave infrared optical filter based on a germanium / zinc sulfide asymmetric film system and a preparation method of the dual-waveband medium-long wave infrared optical filter. The dual-waveband medium-long wave infrared optical filter comprises a front film system, a substrate and a back film system, the front film system and the back film system are formed by alternately overlapping germanium layers and zinc sulfide film layers; the average transmittance of the infrared optical filter in the wave band of 3800 nm to 4800 nm and the wave band of 8000 nm to 10000 nm is not lower than 91%. According to the two-waveband medium-long wave infrared optical filter disclosed by the invention, 3800 to 4800 nm amp is realized; according to the infrared filtering window, the light energy of medium waves and long waves of 8000-10000 nm is improved, the luminous flux of other wavebands is well inhibited, the technical problem of the infrared filtering window in some special infrared spectrum detection systems is solved, and a new scheme is provided for infrared application.

The invention discloses an unmanned aerial vehicle countering system, and relates to the technical field of unmanned aerial vehicle countering, and the system comprises a plurality of guidance unmanned aerial vehicles which are used for carrying out the rigid interception of black flight unmanned aerial vehicles; the radar is used for discovering a black flight unmanned aerial vehicle target; the medium-wave infrared camera is used for performing image recognition on the black-flight unmanned aerial vehicle target; the control center is used for displaying a signal detected by the radar and a target image and generating a control instruction; the radar transmits the control instruction to the unmanned aerial vehicle, and controls and guides the unmanned aerial vehicle to fly to the black flight unmanned aerial vehicle and collide with the target; guidance of the unmanned aerial vehicle further comprises image terminal guidance, namely, an airborne image recognition and tracking system autonomously finds a target, tracks the target and guides the unmanned aerial vehicle to intercept collision; and guiding the unmanned aerial vehicle to autonomously adjust the flight attitude after the target is hit, and executing a task according to an instruction after stabilization. According to an actual deployment scheme, the radar instructs the guidance unmanned aerial vehicle close to the deployment incoming attack direction to take off and execute a countering task, and the interception probability can be effectively improved.

The invention relates to a breakwater structure for wave power generation and a construction method of the breakwater structure. The breakwater structure comprises a lower barrel body, an upper caisson and a power generation device. A compartment is arranged in the upper caisson, and the power generation device is installed in the compartment. A wave inlet hole is formed in the wave facing side of the upper caisson, a cast-in-place adjusting node is arranged on the top of the upper caisson, and a wave wall, a cable pipe trench, a detachable road plate and an overhauling device are sequentially arranged above the node. The breakwater structure and the wave power generation system are integrated by adopting standard barrel type foundation factory prefabrication and floating transportation installation and combining cast-in-place joint leveling and the detachable road plates. The structure has the advantages of being convenient to construct, controllable in cost, stable in structure, convenient to maintain and the like, is suitable for wave power generation under medium and small wave conditions, and is particularly suitable for green power supply and coast protection in areas such as ports and islands.

The invention provides a laser-corrected dual-band infrared passive distance measurement method, which comprises the following steps of: firstly, acquiring information of a target at three continuous sampling moments by using an infrared detection system, and estimating an extinction coefficient and path radiation; then calculating a multi-mode fusion distance at a next sampling moment; correcting a medium-wave extinction coefficient, medium-wave path radiation, a long-wave extinction coefficient and long-wave path radiation by using the field angles, the irradiance and the laser ranging values at the second to fourth sampling moments; and for a subsequent moment, calculating the multimode fusion distance of the target as a resolving value of the target distance at the sampling moment, and then correcting the medium wave extinction coefficient, the medium wave path radiation, the long wave extinction coefficient and the long wave path radiation. According to the method, dual-band infrared passive distance measurement and laser distance measurement are fused, target motion information is combined, accumulative errors of infrared passive distance measurement and a motion model are eliminated through laser correction, the defect of infrared distance measurement is compensated, the distance measurement precision and the distance measurement stability are improved on the premise of concealment, and multi-target real-time distance measurement is achieved.

The invention discloses a medium-wave broadcast coverage simulation method based on a medium-wave analysis technology, relates to the technical field of signal propagation simulation, and is used for solving the problems of single propagation influence evaluation factor dimension and lack of space-time dynamic characteristics during medium-wave broadcast in the prior art. Based on a simulation data set covering a plurality of spatial areas, medium wave propagation analysis models of different time periods are established, propagation diffusion paths of the respective time periods are constructed, the simulation data set is used as an interference source for analogue simulation, and diffusion path loss of medium wave broadcast in any time period and any spatial area is obtained; performing statistics on diffusion path loss of all space areas on the propagation and diffusion paths in the same time period, superposing the propagation and diffusion paths in the same space area in different time periods to obtain broadcast coverage intensity of each space area, marking the broadcast coverage intensity of all the space areas to the whole simulation area, and obtaining broadcast coverage intensity of all the space areas. A broadcast coverage effect view characterizing the broadcast listening quality is generated.

The present invention discloses a metal-polymer target recognition and classification system based on infrared wide spectrum, which belongs to the field of target classification and recognition. It includes: a radiation brightness inversion module for obtaining a detected spectral vector with a target, respectively calculating the response gain vector and radiation bias vector of each band, weightedly calculating the response gain and radiation bias vector of the system, and inverting the radiation brightness vector of the target; a target recognition module for dividing the target's radiation brightness vector into three sub-vectors: shortwave band, medium wave band, and long wave band, respectively inputting them into a trained recognition network to obtain the recognition probability under each band; a fusion classification module for weighted fusion of the recognition probabilities under each band, comparing the fused probability with a set threshold, and if it exceeds, it is a metal material target; otherwise, it is a polymer material target. The present invention breaks through the limitations of interference target recognition, improves the anti-interference ability of the recognition network, and also improves the accuracy of target recognition.

The utility model provides a change-over switch of a medium-wave transmitter, which relates to the technical field of change-over switches of medium-wave transmitters and comprises a mounting base, symmetrical fixing plates I are arranged above the mounting base, symmetrical mounting plates are fixedly connected to the outer surfaces of the two fixing plates I, and the mounting plates are fixedly connected to the outer surfaces of the fixing plates II. Symmetrical second fixing plates are fixedly connected to the outer surfaces of the two mounting plates. According to the change-over switch of the medium wave transmitter, through cooperative arrangement of the mounting base, the first fixing plate, the mounting plate, the second fixing plate and the quick release mechanism, people can quickly detach the contact seat body to maintain the contact spring fixed on the inner wall of the contact seat body, so that the working efficiency of people during maintenance is improved; and moreover, the condition that people are relatively difficult to disassemble due to corrosion of the screws is avoided, and the maintenance difficulty of people on the contact spring fixed on the inner wall of the contact seat body is effectively reduced.

The invention discloses a portable gas leakage detection device based on a refrigeration type superlattice infrared detector, which comprises a detector module, an optical lens group and a data processing unit, and is characterized in that the detector module comprises a refrigeration type detector and a refrigerator, and the refrigeration type detector is based on an infrared radiation absorption effect; the optical lens group comprises a medium-wave infrared lens and a visible light lens; and the data processing unit obtains data including an infrared image and a visible light image, and judges the gas leakage condition after the data is processed by a detection algorithm. According to the portable gas leakage detection device based on the refrigeration type superlattice infrared detector, long-distance and non-contact rapid detection and accurate leakage positioning of organic compounds and other industrial hazardous gases are achieved, and industrial production safety and environment safety are guaranteed.

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.

1. The name of this design product: Power Adapter (Medium Wave Broadcasting). 2. Application of this design product: used for power adapter. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The invention discloses a processing system and method for discharging alkali liquor from sodium carbonate, and belongs to the technical field of chemical engineering, the processing system for discharging alkali liquor from sodium carbonate comprises a distributing device and a conveying mechanism which are sequentially connected, and a washing water circulating system, a belt filter and a medium wave infrared device are sequentially arranged in the direction of conveying alkali liquor from sodium carbonate by the conveying mechanism; the washing water circulation system comprises a first-section washing water mechanism, a second-section washing water mechanism and a third-section washing water mechanism which are sequentially arranged, then third-section washing water treatment, belt filter treatment and medium-wave infrared treatment are sequentially carried out on the soda outlet liquor, the third-section washing water is additionally arranged through gradient heat exchange utilization of desalted water, and a third-section washing water circulation system is constructed. According to the present invention, with the combination of the filter aid compounding and the medium-wave infrared radiation reinforced dehydration, the filtration condition is optimized from the source, such that the purposes of filter cake moisture reducing, filtration pressure difference reducing, equipment scaling relieving and washing efficiency improving are achieved so as to reduce the calcination energy consumption, improve the product purity, prolong the equipment operation period and reduce the maintenance cost;

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.

The invention provides an artificial intelligence-based industrial boiler coking prediction method and system. The method comprises the steps of infrared thermal image time sequence acquisition, multi-spectral dynamic threshold segmentation, acoustic impedance feature extraction, multi-modal working condition fusion, space-time attention prediction modeling and adaptive threshold decision triggering. According to the method, the local threshold values are adaptively calculated on different spectral bands such as short waves, medium waves and long waves, response characteristics of all temperature zones can be considered, the false detection and missing detection risks caused by the fixed threshold values are remarkably reduced, and high-temperature hot spots are extracted more accurately and reliably; acoustic impedance characteristics obtained through calculation quantitatively reflect the structure and viscosity change of a coking layer by using attenuation and time delay information of sound waves in an ash layer, a direct and fine physical basis is provided for subsequent rheological property inference, and the defect that mechanical changes of materials are difficult to capture through pure temperature monitoring is effectively overcome.

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 infrared detectors and discloses an infrared detector wide-band antireflection film based on a multilayer optical stack, which comprises the following specific steps: step one: first, the application wave band of the antireflection film is determined, the antireflection film material MgF2, Si and ZnSe are selected, and the base material is GaSb; step two: according to the Fresnel law and the related theory of light waves, the amplitude of reflected waves and transmitted waves and the change of reflection phase when the light waves pass through different interfaces are researched, the reflectivity characteristic matrix of the multilayer film is solved by using related formulas, and the refractive index and the absorption coefficient of the material are considered. By adopting the novel multilayer film design, the transmittance and the wave band response of the infrared detector are remarkably improved; the antireflection film is not only suitable for short and medium wave infrared detectors but also can be extended to other photoelectric devices, has wide application prospects and market potential, and through the technology, the performance of devices and equipment can be remarkably improved while the cost-effectiveness is maintained.

The utility model discloses a medium-wave transmitter dustproof net device with a moisture-proof structure, and relates to the technical field of medium-wave transmitters. The medium wave transmitter dustproof net device with the moisture-proof structure comprises a concentric-square-shaped shell, a frame body and an automatic positioning structure, a square opening is formed in the top of the concentric-square-shaped shell, a connecting block is fixedly installed at the top of the concentric-square-shaped shell, a positioning groove is formed in the left side of the connecting block, the frame body is arranged on the concentric-square-shaped shell, and a grating blocking net is fixedly installed on the inner wall of the frame body; a dustproof net is arranged on the frame body, a containing cavity is formed between the grating blocking net and the dustproof net, the containing cavity is filled with a drying agent, and the automatic positioning structure is arranged on the frame body and the connecting block. According to the medium-wave transmitter dustproof net device with the moisture-proof structure, dust removal and moisture absorption treatment can be carried out on air entering the cabinet body of the medium-wave transmitter, adverse effects of dust adhesion and large moisture on the medium-wave transmitter can be prevented, the protection effect is improved, and the frame body is convenient to disassemble and assemble.

The invention provides a hydropower station generator set state monitoring system, which comprises a rail type inspection robot used for collecting the vibration amplitude, the shaft system throw, the bearing temperature and the sealing air pressure data of a set; the infrared thermal imaging system is used for acquiring a stator core temperature distribution diagram and a rotor magnetic pole surface dynamic image; the stator end part overheating scanning unit is used for shooting a stator winding end part temperature field by adopting a medium-wave infrared camera; the rotor overheating tracking unit is provided with a visible light camera for capturing the blocking position of a rotor ventilation hole; the multispectral diagnosis module is connected with the unit rotating speed signal synchronous gas monitoring module and the main control server module through the positioning system, and is connected with the rail type inspection robot, the infrared thermal imaging system and the gas monitoring module. The system has the advantages that the false alarm rate is effectively reduced, and the equipment state monitoring accuracy is improved.

The application discloses a kind of medium wave communication navigation integrated signal design method, comprising: generating frame synchronization code and navigation text;The binary code of navigation text is segmented according to fixed bit length, and segmented binary code is obtained;According to order, segmented binary code is two two as a group, and each group of segmented binary code is first converted into series / parallel, then BHC error correction coding is carried out respectively;For each group of BCH code, parallel / series conversion is carried out according to each bit order to output interleaved code, so as to complete the interleaving coding of navigation text;Interleaved coded navigation text and frame synchronization code are modulated using full hopping MPPSK modulation, framing is carried out, multiple frame signals are formed, the multiple frame signals are used to replace the sine carrier in broadcast signal, and composite modulation signal is generated by composite modulation with analog audio signal and transmitted through broadcast station.The application can realize the dual functions of broadcast and navigation without affecting the normal use of users.

The invention relates to a medium-wave multi-phase modulation amplifier based on a silicon carbide MOS (Metal Oxide Semiconductor) tube, which comprises a multi-phase modulator circuit and a power amplifier circuit which are arranged in sequence, and is characterized in that the multi-phase modulator circuit is used for receiving multiple paths of independent pulse width modulation signals, processing the signals and then transmitting the signals to the power amplifier circuit; the power amplifier circuit comprises an H-bridge circuit composed of a plurality of silicon carbide MOS tubes, and the H-bridge circuit generates a radio frequency output signal by alternately conducting diagonal switches. The high-performance silicon carbide MOS tubes are adopted, under cooperation of a multi-phase modulation framework, the efficiency bottleneck of a traditional scheme is broken through, the conduction loss of the medium wave modulation amplifier is reduced, the system efficiency is improved, the power consumption is reduced, and the increasingly high requirement standard at the present stage is met.

The invention provides a medium-long wave double-color superlattice structure capable of reducing spectral crosstalk and a preparation method thereof. The medium-long wave double-color superlattice structure comprises a substrate layer, a buffer layer, a long wave structure layer, a barrier layer, a medium wave structure layer and a cover layer which are sequentially arranged from bottom to top, wherein the barrier layer is an InAs < 0.82 > Sb < 0.18 > barrier layer, the medium wave structure layer adopts a pin structure formed by 8 ML InAs / 7 ML GaSb superlattices, the long wave use absorption layer adopts 14 ML InAs / 7 ML GaSb, and the barrier layer adopts an nbn structure of 10 ML InAs / 7 ML GaSb. According to the invention, the absorption of a long-wave material in a medium-wave band can be effectively reduced, and meanwhile, long-wave photoelectrons entering the medium-wave material are effectively reduced, that is, medium-long wave double-color spectral crosstalk is reduced; the same superlattice material is used in a medium-long wave pin structure of the medium-long wave material, and a barrier layer is added to only long waves, so that the growth difficulty of the material is reduced, and the defects in the material can be effectively reduced; according to the invention, the strain problem caused by the growth of the superlattice laminated layers with different proportions is avoided, and the defects of medium-wave materials are further reduced.

The invention relates to the technical field of medium-wave transmitters, and discloses a heat dissipation device for a medium-wave transmitter, which comprises a medium-wave transmitter body, a first fixing frame and a second fixing frame are arranged on the left and right sides of the medium-wave transmitter body respectively, and liquid cooling assemblies are arranged in the first fixing frame and the second fixing frame respectively. The top of the medium wave transmitter body is provided with a square frame. According to the heat dissipation device for the medium-wave transmitter, by arranging the liquid cooling assembly, when the heat dissipation device is used, cold liquid is pumped into a condensation elbow through a first micro pump, the cold liquid with the high temperature is pumped out through a second micro pump, and electronic parts in the medium-wave transmitter body are cooled through the condensation elbow; meanwhile, the sleeving structure of the liquid guide bend and the condensation bend is matched with the inclined design of the micro-convex plate, the arc-shaped liquid guide bend is connected to the outer surface of the condensation pipe in a sleeving mode, dead-corner-free collection of water drops is achieved, water flow is guided by the micro-convex plate to be discharged in a directional mode, and water drop splashing is thoroughly eradicated.

The invention provides a neural network training method, a model construction method, devices, equipment and a medium, when a two-phase medium fluctuation feature learning network is trained, reservoir physical property parameters are used as input, a plurality of prediction wave equation coefficients of a sample two-phase pore medium elastic wave propagation model are predicted, and the two-phase medium fluctuation feature learning network is trained by combining a physical constraint mechanism based on plane wave analysis. According to error loss between predicted frequency dispersion attenuation characteristics and real frequency dispersion attenuation characteristics of a sample biphase pore medium elastic wave propagation model, parameters of a biphase medium fluctuation characteristic learning network are adjusted, and the network is made to have higher prediction stability and physical consistency through back propagation; the prediction wave equation coefficient output by the two-phase medium fluctuation feature learning network is ensured, and meanwhile, the data precision and physical consistency requirements are considered, so that the physical consistency, the expression accuracy and the generalization ability of the constructed target two-phase pore medium elastic wave propagation model are improved.

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.

Techniques for controlling a low-profile medium wave transmitting system are provided. An example of an antenna system according to the disclosure includes a first radiator operably coupled to a first amplifier, a first modulator operably coupled to the first amplifier and configured to provide a first radio frequency signal to the first amplifier, a second radiator operably coupled to a second amplifier, a second modulator operably coupled to the second amplifier and configured to provide a second radio frequency signal to the second amplifier, a control module operably coupled to the first modulator, first amplifier, the second modulator, and the second amplifier, the control module being configured to control a delta phase value based on the first radio frequency signal and the second radio frequency signal, and control the power output of the first amplifier and the second amplifier.

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 invention discloses a medium-wave transmitter with a noise-reduction anti-interference structure, and relates to the field of medium-wave transmitters, the medium-wave transmitter comprises a medium-wave transmitter shell, a sealing top cover and a wire harness structure, the medium-wave transmitter shell is internally provided with a fully-closed automatic opening and closing structure, and the fully-closed automatic opening and closing structure automatically opens and closes the sealing top cover. A semiconductor heat dissipation structure is arranged at the bottom end of the medium wave transmitter shell, a fan structure is installed at the bottom end of the semiconductor heat dissipation structure, and a fin assembly is installed at the bottom end of the fan structure. The sealing top cover is controlled to be automatically opened and closed through the full-closed automatic opening and closing structure, the sealing top cover is designed in an embedded mode and is tightly closed, and dust is effectively prevented from being embedded; the rubber sealing plug-ins installed at the joints of the preset holes in the two sides of the medium-wave transmitter shell and the power wires achieve sealing of the wire harness connecting portions, electromagnetic interference is reduced, dust and moisture are prevented from entering the interior of the shell, and the anti-interference capacity and the working stability of equipment are improved.

The invention discloses a highway engineering asphalt concrete construction intelligent management and control method based on multi-source data fusion and neural network optimization, and the method comprises the steps: carrying out the light-radiation combined adaptive registration based on received long wave and medium wave infrared images, and synchronously estimating the registration uncertainty; and according to a registration result, performing dynamic emissivity inversion and micro-radiation income and expenditure correction, and generating a corrected temperature truth value map with pixel-level confidence. A hot seam region to be compacted is identified based on the map. And for the region, identifying a cooling ash bin model through online recursion, and determining a probabilistic latest first-round compaction time window containing an expected value and a variance. And constructing a chance constraint according to the probabilistic time window, and planning and outputting a control instruction meeting the constraint for the compaction equipment. According to the method, a closed loop from high-fidelity perception to probabilistic decision is realized, and the quality control level of asphalt pavement construction is improved.

The invention relates to a multi-band common-aperture imaging system, particularly provides a multi-band common-aperture composite detection optical system, and is used for solving the technical problem that an existing multi-band common-aperture imaging system cannot meet all-day and all-weather detection requirements due to the fact that band information is not rich enough and visible to long-wave infrared bands cannot be covered. According to the multiband common-aperture composite detection optical system of the invention, through the combined design of the off-axis four-mirror type front beam shrinking assembly, the first dichroic mirror, the second dichroic mirror, the third dichroic mirror, the reflecting mirror and the four imaging units with different wavebands, the multi-band common-aperture composite detection optical system can be realized; target characteristic information of four wave bands of visible near infrared, short wave infrared, medium wave infrared and long wave infrared can be rapidly and accurately detected in real time; meanwhile, the common aperture design enables the optical axis consistency of the four channels to be very strong, guarantees the high consistency of light rays of different wave bands in the propagation process, enables the imaging to be accurate and clear, and enables the information to be rich.

The utility model belongs to the technical field of medium-wave broadcasting, and relates to a one-tower multi-frequency self-standing medium-wave transmitting tower, which mainly comprises a plurality of supporting upright posts, a feeder line central upright post for fixedly transmitting a transmitting signal, and a plurality of insulating devices which are arranged on the supporting upright posts and partition the supporting upright posts into independent transmitting units, the height of each transmitting unit can be determined according to the required transmitting frequency, and the tower column is further adjusted to achieve the optimal transmitting effect; and compared with a traditional launching tower, the contact area with air is reduced, the device can be suitable for different seasonal changes, manual adjustment of the network is not needed, and adaptability and reliability are high. According to the utility model, the integrated self-standing tower column is provided with a plurality of transmitting units, so that the integrated self-standing tower column can simultaneously transmit various signals with different frequencies, the structure is simplified, the cost is reduced, the occupied area is saved, and the signals are efficiently transmitted; the whole design is scientific and reasonable, the structure is simple, the land cost can be effectively saved, the manpower demand is reduced, and the application degree is improved.