165 results about "Medium wave" patented technology

The invention provides a single-pixel-based visible light infrared fusion compression spectrum imaging system and method, and the method comprises the following steps: 1, carrying out the signal coding of a to-be-detected target signal, and obtaining a coded to-be-detected target infrared signal and a coded to-be-detected target visible light signal; step 2, inputting a to-be-measured target infrared signal into an infrared imaging light path, collecting a medium-wave infrared spectrum intensity value, and inputting a to-be-measured target visible light signal into a visible light imaging light path to collect a visible light spectrum intensity value; step 3, carrying out compressed sampling and reconstruction operation on the visible light spectrum intensity value and the medium wave infrared spectrum intensity value to obtain an infrared hyperspectral image and a visible light hyperspectral image of the target to be detected; 4, performing image fusion according to the infrared hyperspectral image and the visible light hyperspectral image to obtain a fused image with rich details; the fusion imaging of the method has the characteristic of keeping the feature information of the target scene so as to realize high-quality imaging.

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 discloses a medium-wave refrigeration infrared lens, the focal length of which is 300mm, and the infrared lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along the transmission direction of an optical axis, the first lens, the third lens and the fifth lens are all meniscus positive lenses with convex surfaces facing the object side, the second lens is a meniscus negative lens with a convex surface facing the object side, and the fourth lens is a meniscus positive lens with a convex surface facing the image side; wherein the first lens and the fifth lens are made of silica glass, the second lens and the third lens are made of germanium glass, and the fourth lens is made of chalcogenide glass. By reasonably distributing the focal power, adjusting the combination and arrangement mode of the lenses and utilizing the difference of thermal characteristics between different materials, the positive focal power and the negative focal power are matched with each other, the influence caused by temperature change is compensated, and therefore athermalization is achieved under the condition that it is ensured that the size is small. The invention further discloses an imaging device.

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 infrared optical system with a super large zoom ratio of 50×, which comprises a front group, a rear group and two folding reflectors from the object side to the image side, wherein: the front group comprises a coaxial front lens group 1, a zoom lens, a compensating lens and a focusing lens, and the front group also comprises a reflector 1; the rear group comprises a rear lens group 1, a rear lens group 2, a reflector 2 and a rear lens group 3; the imaging light beam of the object side is incident on the front lens group 1, the zoom lens, the compensating lens and the focusing lens, and is folded and reflected on the reflector 1 for a primary imaging, and then passes through the rear lens group 1 and the rear lens group 2, and is folded and reflected on the reflector 2, and is formed on the detector for a secondary imaging through the rear lens group 3. The invention has the characteristics of long focal length, small size, light weight and high resolution, and has good imaging quality at all focal lengths.

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 invention provides a MIM enhanced controllable mid-infrared photoelectric detector, wherein the upper surface of the substrate is separated into source / drain electrodes on both sides and a metal back reflection layer in the middle by a hexagonal boron nitride layer, the source / drain electrodes are titanium-gold metal composite electrodes, the lower layer is titanium as an adhesion layer, and the upper layer is gold; the metal back reflection layer is completely covered by the hexagonal boron nitride layer; a molybdenum disulfide layer and a black arsenic phosphide layer form a b‑AsP / MoS2 heterojunction, the overlapping part of the two layers is on the metal back reflection layer, and the molybdenum disulfide layer and the black arsenic phosphide layer respectively form ohmic contacts with the metal composite electrode on one side, and a MIM grating is integrated on the b‑AsP / MoS2 heterojunction junction region, and a transverse resonance mode is formed between the metal back reflection layer and the periodic metal grating, so that the light absorption of the b‑AsP / MoS2 heterojunction is significantly increased in the mid-wave band range after 4μm in the mid-wave infrared, thereby enhancing absorption control.

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 roll shape design method of a variable-convexity working roll with medium wave control capability. The method comprises the following steps: setting a coordinate origin on a working roll, and setting a conventional cubic CVC curve in a secondary convexity range of the working roll and an M-shaped quartic curve symmetrical about a roll surface midpoint; on the basis of a conventional cubic CVC curve, according to the requirement of no-load roll gap convexity compensation amount at the internal width position of the working roll, an M-shaped quartic curve symmetrical about the midpoint of the roll surface is overlaid on the roll gap, and a variable-convexity working roll shape curve with the middle wave control capacity is obtained; and calculating to obtain the roll shape coefficient of each roll of the roll shape curve of the variable-convexity working roll with the medium wave control capability, so as to finally determine the roll shape curve of the variable-convexity working roll with the medium wave control capability. According to the method, on the basis of not changing the secondary convexity range of the no-load roll gap of the continuous variable convexity section and not changing the plate shape control model, the convexity of the roll gap at different strip steel width positions is increased, and the purpose of medium wave control is achieved.

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 relates to the technical field of radio frequency circuits, in particular to a multi-path coupler suitable for a medium wave receiver, which comprises a plurality of band-pass filtering channels, each band-pass filtering channel comprises a single-pole triple-throw switch, two coupling band-pass filtering networks and a single-pole double-throw switch, the use of the single-pole three-throw switch array prevents the coupling band-pass filter networks of the adjacent channels from being accessed at the same time to influence the filter performance, and one of the two coupling band-pass filter networks of the adjacent channels can be selected to be accessed through the single-pole three-throw switch, so that the filter performance is improved. Therefore, the purpose that one receiving antenna can be connected to any one or more coupling band-pass filtering networks can be achieved, a plurality of band-pass filter channels can share one receiving antenna, and the use requirement that a plurality of narrow-band filters with high out-of-band rejection share one antenna is met.

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.

A target detection method based on infrared multiband image fusion belongs to the technical field of target detection, and comprises the following steps: analyzing and constructing a trunk structure fusion network model based on Transform; carrying out block processing and coding on the input graph of the network; all embedded information is input into a Transform encoder based on medium wave / long wave multi-head self-attention; a target detection mark output by the encoder is sent to the multi-layer sensor, and other block marks are used for fused image reconstruction; and training the constructed network by using the training image data set, and outputting a final target detection result and an infrared fusion image. According to the method, good target detection performance can be obtained, infrared image fusion can be completed, and a result can be output. Therefore, the method is an effective target detection method based on infrared multiband image fusion.

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 utility model discloses a digital PDM medium wave transmitter pulse width modulator. The modulator comprises an audio processing circuit, a power control signal processing circuit, a single-chip microcomputer and a power amplification circuit. An analog-to-digital converter and a pulse width modulation wave generator are integrated in the single-chip microcomputer. The audio processing circuit and the power control signal processing circuit are respectively connected to the analog-to-digital converter; and the pulse width modulation wave generator is connected with the power amplification circuit. The audio processing circuit receives balanced audio signals, processes the balanced audio signals, inputs the processed balanced audio signals to the analog-to-digital converter and converts the processed balanced audio signals into audio digital signals, and the power control signal processing circuit processes received power control signals, inputs the processed power control signals to the analog-to-digital converter and converts the processed power control signals into power control digital signals. The single-chip microcomputer combines the audio digital signal and the power control digital signal according to a set algorithm, converts the audio digital signal and the power control digital signal into a duty ratio value and controls the pulse width modulation wave generator to generate a pulse signal with a corresponding duty ratio, and the power amplification circuit carries out power amplification on the signal so as to meet requirements of post-stage equipment. The pulse width modulator has the advantages that the circuit structure is simple, the integration level is high, and functional parameters are easy to modify and expand.

1. Name of the design product: Medium-wave transmitting lightning arrester. 2. Use of the design product: This design is used to protect equipment from the impact of lightning. 3. Design key points of the design product: Lies in the shape. 4. Picture or photograph that best shows the design key points: Perspective view 1.

The invention discloses a medium-wave refrigeration double-view-field infrared lens. The medium-wave refrigeration double-view-field infrared lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged in the optical axis transmission direction. The first lens is a meniscus positive lens with the convex surface facing the object side, the second lens is a biconcave lens, the third lens and the fifth lens are biconvex lenses, and the fourth lens is a meniscus positive lens with the convex surface facing the image side; the first lens can reciprocate along the optical axis direction, the second lens can reciprocate along the optical axis direction, the air interval between the first lens and the second lens is 15-27.9 mm, the air interval between the second lens and the third lens is 5-17.9 mm, the air interval between the third lens and the fourth lens is 25 mm, and the air interval between the fourth lens and the fifth lens is 24.92 mm. The lens provided by the invention is simple in structure, large in target surface and clear in imaging, and can be matched with a refrigeration type detector with the resolution ratio of 320 * 256 and 30 [mu] m for use. The invention further discloses an imaging device.

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 utility model discloses a medium wave transmission system. The system includes a main transmitter, a first backup transmitter, a second backup transmitter, a first coaxial switch, a first controller, a second coaxial switch, a second controller, a first load, a second load, an antenna feed network and an antenna; wherein the main transmitter is connected to the first coaxial switch, the first backup transmitter and the first load are connected to the first coaxial switch; the second backup transmitter and the second load are connected to the second coaxial switch; the first coaxial switch and the second coaxial switch are connected; the second coaxial switch is connected to the antenna feed network, and the antenna feed network is connected to the antenna; the first coaxial switch is connected to the first controller, and the second coaxial switch is connected to the second controller. Through the above technical solution, in the case of failure of the main transmitter and the first backup transmitter, the second backup transmitter can be enabled to shorten the off-air time and ensure the stability of safe broadcasting.

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 present invention discloses a thiomercury colloidal quantum dot short and medium infrared detector, which comprises: a substrate, a bottom electrode, a blended quantum dot layer, a thiomercury quantum dot layer, a thin film layer and a top electrode in sequence; wherein the blended quantum dot layer and the thiomercury quantum dot layer are used to form an n‑on‑p type PN junction; the bottom electrode and the top electrode are used to connect positive and negative charges to conduct current; the thin film layer is used to buffer and protect the thiomercury quantum dot layer. The disclosed embodiment forms a thiomercury quantum dot device based on an n‑on‑p type PN junction with top light transmission by forming a blended quantum dot layer and a thiomercury quantum dot layer, which has the advantages of good photoelectric detection performance and low application cost in short and medium wave infrared.

The utility model discloses a medium wave transmitter with a noise reduction structure, which relates to the technical field of medium wave transmitters, and comprises a base, a medium wave transmitter main body and a modem, the middle part of the top end of the base is in butt joint with the medium wave transmitter main body, and the outer wall of the medium wave transmitter main body is connected with a box door through a hinge mechanism. When the medium wave transmitter with the noise reduction structure is used, fixation of the modem is canceled through the fixing mechanism, and then the modem is taken out for maintenance, so that people do not need to be limited by a main body shell of the medium wave transmitter during maintenance, time is saved, the effect of facilitating maintenance is achieved, and the maintenance efficiency is improved. The medium-wave transmitter main body is limited through the noise reduction mechanism, and the noise reduction box is installed on the outer side of the medium-wave transmitter main body, so that the interference of noise on the medium-wave transmitter during working is reduced, the integrity and the propagation quality of signals are ensured, and the effects of facilitating limiting and noise reduction are achieved when the medium-wave transmitter is used.