190 results about "Middle infrared" patented technology

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention discloses an on-line detection method for volatile organic compounds in waste gas, and belongs to the field of waste gas emission monitoring, the detection method comprises the following specific steps: I, starting a quantum cascade laser frequency comb of a middle infrared band, calibrating various parameters of the quantum cascade laser frequency comb, and ensuring to cover a characteristic absorption area of the volatile organic compounds in the waste gas; iI, inputting the waste gas into a gas detection chamber through a sampling pipeline, monitoring the state of the waste gas in real time, and dynamically adjusting the conditions of the gas detection chamber according to various collected signals; the device can capture instantaneous fluctuation of waste gas concentration in real time, meets the high-speed dynamic emission monitoring requirement, has extremely high coherence and narrow linewidth, can analyze tiny spectral line differences which cannot be distinguished by a traditional spectrograph, remarkably improves the detection precision and the recognition capability, ensures that a measurement result still keeps consistency and high reliability under different working conditions, and is suitable for large-scale popularization and application. The signal-to-noise ratio is obviously improved, the power drift is reduced, and long-time stable operation is realized.

The invention discloses an intelligent cabin environment sensing and control method based on a vehicle sensor, and relates to the technical field of intelligent automobiles, and the method comprises the following steps: in the operation process of an intelligent cabin, an infrared thermal sensing system collects thermal imaging data in an automobile in real time, extracts multi-dimensional feature data based on the obtained thermal imaging data, and sends the multi-dimensional feature data to the intelligent cabin; and forming an infrared thermal image characteristic data parameter set. According to the method, the key features of the infrared thermogram are extracted, and the machine learning model is combined, so that accurate identification and dynamic suppression of the thermo-optical interference state are realized. According to the method, sampling and filtering strategies can be adaptively adjusted in complex environments such as strong light reflection, a real thermal image contour is reconstructed, a non-human body heat source is effectively eliminated, the recognition accuracy and the operation stability of an infrared thermal sensing system are remarkably improved, the misjudgment rate is reduced, and the safety and the reliability of an intelligent cabin are enhanced.

Techniques are provided for variable sensitivity in infrared imaging. In one example, an infrared imaging system includes an infrared imager and a logic device. The infrared imager is configured to capture a first infrared image of a scene using a sensitivity setting. The logic device is configured to determine a temperature associated with the scene based on a second infrared image of the scene. The logic device is further configured to determine the sensitivity setting based on an ambient temperature associated with the infrared imager and the temperature associated with the scene. Related devices and methods are also provided.

The invention relates to a bionic mist catching net material and a construction method and application thereof, and belongs to the field of air water collecting materials. The bionic mist catching net is a thermoplastic polymer fiber net, and radiation refrigeration particles are blended in fibers of the fiber net; and the part coated with the hydrophobic micro-nano coating and the part not coated with the hydrophobic micro-nano coating on the surface of the fiber net are alternately distributed. The radiation refrigeration particles are introduced into the bionic mist catching net material, and the hydrophobic coating is distributed on the surface of the bionic mist catching net material, so that the light reflectivity and the intermediate infrared emissivity are improved, and the radiation refrigeration efficiency is improved. Besides, the surface hydrophobic coating part forms a super-hydrophobic area, fog drops are promoted to be quickly coalesced into beads after collision, energy dissipation caused by spreading of a liquid film is reduced, the fiber substrate without the coating is kept hydrophilic, a heterogeneous wetting surface is formed, Laplace pressure difference is generated by surface energy difference at a hydrophilic-super-hydrophobic interface, and the super-hydrophobic surface is formed. The spontaneous migration of liquid drops from a super-hydrophobic region to a hydrophilic region is accelerated, and the water collection efficiency is remarkably improved.

The invention discloses a flatness detection device for air conditioner metal pipeline spraying, and relates to the technical field of pipeline anti-corrosion spraying. The flatness detection device for spraying of the air conditioner metal pipeline comprises a spraying bin, an input pipeline is assembled at the top of the spraying bin, and an air draft pipeline is assembled at the bottom of the spraying bin; and the recycling bin filter plate is assembled between the spraying bin and the recycling bin. According to the flatness detection device for spraying of the air conditioner metal pipeline, the air conditioner metal pipeline is put into the spraying bin, a high-pressure liquid pump and a servo motor are started, and a reciprocating lead screw, a square pipeline, a pipeline connector, a gear, a first toothed bar, a second toothed bar, a connecting rod and a limiting rod are matched, so that anti-corrosion liquid can be rotationally sprayed out in different rotating directions; and in the reciprocating motion process of the spray head, the infrared distance meter can perform corresponding flatness detection operation on the air conditioner metal pipeline which is just sprayed, so that the detection efficiency of the device is improved.

Permafrost thawing prevention may involve deploying a cooling geotextile onto a permafrost soil. The geotextile may include a biomass scaffold comprising natural plant-based fibers. The geotextile may further include a cellulose layer comprising cellulose fibers laminated onto the biomass scaffold such that the cellulose fibers are physically entangled with the plant-based fibers. The geotextile may further include a hydrophobic and biodegradable coating which defines at least one surface of the geotextile. The geotextile may be optically opaque, exhibits high solar reflectivity, and maintains high mid-infrared emissivity to enable passive radiative cooling.

The invention discloses a fuel gas leakage detection system based on mid-infrared laser, relates to the technical field of fuel gas detection, and aims to solve the problems that a large-area region is difficult to cover quickly and only close-range detection can be carried out in an existing laser fuel gas leakage detection method. The gas leakage detection system comprises a laser emission module, an infrared imaging detector module and a data processing module, the laser emission module is used for emitting an intermediate infrared laser beam to a to-be-detected area; the infrared imaging detector module is used for collecting an infrared spectrum signal of the to-be-detected area in real time; the infrared spectrum transmitting module is used for transmitting the infrared spectrum signal to the data processing module; and the data processing module is used for processing the received infrared spectrum signal to obtain a gas leakage detection result of the to-be-detected area. The method is suitable for detecting gas leakage in a natural gas pipeline and a liquefied petroleum gas storage tank area.

The invention discloses a method for synchronously realizing medium-wave infrared spectral imaging metasurface design and spectral image reconstruction. The method comprises the following steps: firstly, establishing a'structure parameter-spectral response 'database of a metasurface unit through simulation software; a forward prediction network is then constructed to predict its spectral response curve from the structural parameters. On the basis, a plurality of metasurface units with differentiated spectral characteristics are arranged on a two-dimensional plane in a spatial-spectral coding mode, and an input hyperspectral image is coded through convolution operation to generate a measurement image. And the target hyperspectral data is recovered from the measurement map in cooperation with a spatial-spectral decoding network. According to the method, metasurface structure design and reconstruction network training are integrated, structure parameters and decoding network weights are updated at the same time through back propagation, collaborative optimization of hardware and software is achieved, the spectrum reconstruction precision can be remarkably improved, the design period can be shortened, and the method is suitable for large-scale popularization and application. The method has a wide application prospect in the fields of spectral imaging, spectral detection, identification and the like of a middle-infrared band.

The invention provides a preparation method and device of Bi2O3-B2O3 inverse magnetic rotation glass, and the preparation method comprises the following steps: (1) placing a glass raw material in a closed heating furnace, introducing ultra-dry oxygen, and simultaneously exhausting outwards to enable the pressure in the furnace body to be P1 which is more than or equal to 1kPa and less than or equal to 5kPa; (2) heating to melt the glass raw material in the furnace body into molten glass, raising the temperature to a clarification temperature, introducing the mixed gas into the molten glass by a bubbling method, simultaneously homogenizing and stirring, and stopping introducing the mixed gas and starting defoaming and stirring when the homogenizing and stirring time reaches t1; wherein the mixed gas comprises ultra-dry oxygen and boron trichloride, the volume ratio of the ultra-dry oxygen to the boron trichloride is k, and k is (1-5): 1; (3) cooling, forming, annealing and pouring; in the step (2) and the step (3), the pressure in the furnace body is kept P1. The Bi2O3-B2O3 diamagnetic optical rotation glass prepared by the method disclosed by the invention is stable in magneto-optical performance and low in hydroxyl absorption coefficient in a middle-infrared band.

The invention discloses a fire early warning method and a program product. The method comprises the steps that infrared image data and visible light image data at a plurality of collection positions in a target detection area are acquired, the infrared image data comprise infrared images at a plurality of collection moments, and the visible light image data comprise color images at a plurality of collection moments; determining multi-source fire characteristic data at the acquisition time according to the infrared image and the color image at each acquisition time, and determining enhanced fire characteristic data at the acquisition time according to the infrared image, the color image, the multi-source fire characteristic data and the historical fire scene data; determining a fire risk evolution probability at the acquisition position according to the enhanced fire feature data at the acquisition position at the plurality of acquisition moments; generating a fire risk prediction report according to the fire risk evolution probabilities at the plurality of acquisition positions, and performing fire early warning according to the fire risk prediction report and a preset multi-stage early warning mechanism; therefore, accurate monitoring of the fire hazard is realized.

The invention belongs to the technical field of quantitative remote sensing, and relates to a mid-infrared hyperspectral emission and reflection characteristic integrated inversion method, which comprises the following steps: acquiring mid-infrared hyperspectral satellite remote sensing data, and optimizing sensing entrance pupil radiance data to obtain optimized entrance pupil radiance data; the intermediate infrared hyperspectral satellite remote sensing data comprises sensing entrance pupil radiance data; performing atmospheric correction on the optimized entrance pupil radiance data by using a radiation transfer model to obtain surface brightness temperature and atmospheric downward radiation, and calculating solar irradiance reaching the surface; constructing a mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework, and performing earth surface bi-directional reflectivity inversion based on the mid-infrared hyperspectral earth surface bi-directional reflectivity inversion framework to obtain earth surface bi-directional reflectivity and earth surface equivalent radiance; constructing a scene self-adaptive framework, and performing inversion based on the scene self-adaptive framework to obtain the surface temperature and the surface emissivity; therefore, accurate separation of surface emission radiation and surface reflection radiation is completed.

The invention discloses a passive radiation-cold storage composite box body and a preparation method. The box body sequentially comprises a composite radiation film, a heat insulation layer and a cold storage layer from outside to inside. The outer-layer radiation film is composed of an elastic organic matrix and high-reflection inorganic particles such as barium sulfate, has high solar reflectivity and mid-infrared high emissivity, and can effectively restrain solar absorption and achieve radiation heat dissipation in the daytime. The heat insulation layer is made of XPS, EPS, aerogel felt and other low-heat-conduction materials so as to reduce external heat transfer. Phase change microcapsules are dispersed in the cold storage layer, and flake graphite and other high-thermal-conductivity fillers can be added to improve the cold transfer efficiency and temperature uniformity. And the phase-change material realizes automatic cold storage and cold release through a latent heat mechanism, so that the temperature in the box body is kept stable. Through the synergistic effect of radiation refrigeration, heat insulation and phase change cold storage, long-time and recyclable passive cold chain temperature control is achieved, and the device has the advantages of being simple and convenient in structure, high in cost performance, flexible in application, uniform in internal temperature distribution and the like.

This invention discloses an infrared temperature measurement correction method, apparatus, and system for three-dimensional curved surfaces. The infrared temperature measurement correction method includes: dividing the blade surface into at least two emissivity measurement regions according to the surface type of the blade being measured; acquiring the emissivity distribution of each emissivity measurement region on the blade surface at different temperatures; obtaining bidirectional reflection distribution functions for different surface types based on the projected energy of the infrared light source at different incident angles and the reflected energy received by the infrared camera at different detection angles; and obtaining the corrected measurement temperature based on the acquired emissivity distribution of each emissivity measurement region on the blade surface at different temperatures and the bidirectional reflection distribution functions for different surface types. This invention has a wide range of applications and high correction accuracy, and can be used to correct infrared temperature measurements of curved surfaces such as aero-engine turbine blades in complex environments, enabling non-contact, multi-dimensional, and online measurement of curved surfaces.

This utility model relates to the technical field of heating equipment for livestock farming, and discloses an infrared radiation plate for pig nursery pigs, including a shell and a first heating element. The first heating element is located inside the shell and is attached to the inner front wall of the shell. Compared with heating tubes, the first heating element provided by this utility model can provide a uniform heating effect for the infrared emitting plate, and the radiant heating area is large. Therefore, it is not necessary to use multiple heating tubes to heat the living environment of the nursery pigs, which can avoid the problem of increased pig farming costs due to increased purchase costs of heating plates. Moreover, the infrared emitting plate provided by this utility model has a simple structure, and users can directly plug it in after delivery, eliminating complicated installation procedures. In the humid and regularly disinfected environment of the pig farm, the service life of the infrared emitting plate is longer than that of heating tubes, which can greatly reduce the equipment investment of pig farming enterprises.

The application provides a yttrium barium copper oxide photonic crystal and a preparation method thereof. 7‑x The photonic crystal structure is composed of periodic yttrium barium copper oxide (YBa2Cu3O 7‑x ) superconducting material circular crystal columns, the lattice constant is 2630nm, and the radius of the circular crystal column is 500nm. The photonic crystal can change the position and width of the band gap by changing the light incidence angle, so that the middle infrared band gap is realized. The photonic crystal is prepared by adopting a magnetron sputtering method to prepare a yttrium barium copper oxide film on a strontium titanate single crystal substrate, and then adopting a focused ion beam method to process the yttrium barium copper oxide film into a periodic nanostructure composed of yttrium barium copper oxide circular crystal columns, so that the yttrium barium copper oxide photonic crystal is obtained. The preparation method of the yttrium barium copper oxide photonic crystal is simple and easy to control.

This invention relates to the field of image sensing data processing and discloses a method for diagnosing the thermal environment of blue-green spaces in cold-region cities based on multispectral remote sensing. The method includes the following steps: acquiring multispectral remote sensing images, three-dimensional building elevations, and solar apparent shape parameters; calculating the illumination shading coefficient of blue-green space pixels to form a three-dimensional dynamic shadow mask; constructing a microscopic phase transition evolution operator using the sensitivity gradient of radiation intensity in different polarization directions and mid-infrared reflectivity; inputting the mask and operator into the thermal infrared radiation measurement equation to reconstruct the dynamic surface temperature; solving the surface energy balance equation based on the dynamic surface temperature, separating the latent heat storage of phase transition energy, and constructing a latent heat buffer index; and performing a comprehensive diagnosis of the thermal environment health based on this index. This invention effectively overcomes the temperature measurement errors caused by complex shading and phase state interweaving, accurately isolates the latent heat energy of phase transition, and achieves precise positioning and objective quantitative diagnosis of microclimate anomalies in cold-region cities.

The embodiment of the application discloses an inverter and a photovoltaic power generation system, wherein the inverter can be applied to a photovoltaic scene, a vehicle-mounted scene and the like. The inverter comprises a shell, a device group and an infrared temperature measurement component. The device group and the infrared temperature measurement component are arranged in the shell, wherein the infrared temperature measurement component is used for temperature monitoring of the device group. The infrared temperature measurement component is a non-contact temperature measurement component, has a wide measurement range, can simultaneously perform temperature detection on multiple devices, can greatly improve the comprehensiveness of temperature detection, and can reduce the situation that some devices are missed in monitoring, for example, a bus capacitor, a conductive copper bar and the like.

The application provides a middle wave infrared detection chip and system, the chip is composed of multiple detection units arranged in the same plane, the detection units are sequentially composed of a substrate, a buffer layer, a lower contact layer, an absorption layer, a barrier layer and an upper contact layer, the chip is arranged based on an nBp type structure, the buffer layer, the lower contact layer, the absorption layer, the barrier layer and the upper contact layer all adopt a superlattice structure arranged in multiple periods, the thickness, the number of layers and the doping concentration of the multiple layers of InAs doped layers and GaSb doped layers arranged in each period are controlled, so that the suppression of dark current in the middle infrared detection process is realized, and the quantum efficiency is effectively improved.

The invention provides a multiband intelligent radiation temperature control device, which realizes multiband intelligent radiation temperature control through innovative design, and is characterized in that a first micro-unit and a second micro-unit with different characteristic lengths are adopted in an optical functional layer, and according to an electromagnetic resonance theory, the first micro-unit with the long characteristic length is matched with a far infrared band wavelength, and the second micro-unit with the long characteristic length is matched with a far infrared band wavelength; the far infrared radiance can be modulated along with the change of the external temperature, and the second micro-unit with the short characteristic length is adaptive to a middle infrared band to realize corresponding radiance modulation; meanwhile, large-area temperature control uniformity is guaranteed through array arrangement of the modulation areas, and environment adaptability is enhanced through combination of the protection layer and the optical function layer. Compared with a traditional single-band temperature control device, the design breaks through band limitation, achieves mid-infrared and far-infrared dual-band cooperative regulation and control, can respond to environment temperature changes in real time, improves the temperature control precision and dynamic performance, and effectively solves the problems that in the prior art, temperature control is not accurate in a complex environment, and the application scene is single.

The invention relates to the technical field of drying ovens, in particular to a novel intermediate infrared ceramic heating plate type energy-saving air floatation drying oven. Comprising a drying oven outer frame, an air inlet pipe, a first-area exhaust port, an air return pipe, an upper air collecting pipe, a nozzle, a second-area exhaust port, a first-area lower air nozzle, a first-area lower air collecting pipe, a second-area lower air nozzle, a second-area lower air collecting pipe, a first-area circulating fan, a first-area explosion door, a second-area circulating fan, a second-area explosion door and a mid-infrared ceramic heating plate. According to the principle of aerodynamics, stable operation of a base material in the drying oven is achieved through pressure generated by an air nozzle or a guide rail, the intermediate infrared ceramic heating plate is arranged in the drying oven, the efficient and uniform heating environment is provided, meanwhile, the air duct design of the drying oven is optimized, it is ensured that hot air circulation is uniform, and the drying efficiency is improved.

The invention relates to a low-light scene infrared and visible light image rapid fusion method based on OpenCL, and belongs to the technical field of computer vision. According to the method, a low-light enhancement task of a visible light image and a fusion task of infrared and visible light images are subjected to combined modeling. Based on a brightness component of a color space, low light enhancement and gradient transfer are jointly optimized, and simple and effective enhancement fusion of an infrared image and a visible light image in a low-illumination night scene is realized. The invention provides a complementary logarithmic gamma correction function, the ELGC realizes low light enhancement, the SLGC realizes high light suppression, and the ELGC and the SLGC interact with each other, so that the enhancement of general brightness in the daytime can be realized.

The invention relates to a transparent directional radiation refrigeration material and a preparation method thereof. The transparent directional radiation refrigeration material is formed by assembling a sawtooth grating film deposited with an infrared reflecting layer and an impedance matching layer filled with a sawtooth structure. The infrared reflecting layer is a transparent metal oxide layer. The transparent directional radiation refrigeration material satisfies the following conditions: the average transmittance of a visible light wave band is greater than or equal to 65%; the average emissivity difference value between the high emission side and the low emission side of the middle infrared band is larger than or equal to 40%. Compared with the prior art, the radiation cooling material disclosed by the invention has high transmittance in a visible light wave band and asymmetric directional high emissivity in a middle infrared wave band, so that the radiation cooling effect of the building facade transparent enclosure structure can be improved; the problem that the radiation refrigeration performance is limited due to the omni-directional high emissivity of traditional glass of a building facade is solved, and the energy-saving effect of a facade window can be improved.

The present application relates to the leather technical field, specifically to a cool leather and its preparation process, the cool leather includes finishing layer and leather blank layer from surface layer to bottom layer, the raw material of finishing layer contains infrared reflection composition, the raw material of leather blank layer contains cool dye. The application of infrared reflection composition and cool dye in finishing layer and leather blank layer directly reduces the absorption of solar infrared radiation, reduces the temperature from the source, realizes the cool effect, reduces the temperature of leather surface and interior, reduces the material aging, hardening, cracking and other phenomena caused by high temperature, prolongs the service life of leather products.

A display device includes a display panel having a display area divided into a plurality of image display areas and a plurality of biometric information measurement areas, display pixels arranged in the plurality of image display areas and the plurality of biometric information measurement areas, light-sensing pixels arranged in the plurality of biometric information measurement areas, infrared light-emitting pixels arranged in the plurality of biometric information measurement areas, a display scan driver configured to drive the display pixels and the infrared light-emitting pixels to emit light, a light-sensing scan driver configured to drive the light-sensing pixels to sense light, and a main driver circuit configured to detect a user's pulse wave signals and measure biometric information using light-sensing signals received through the light-sensing pixels, wherein the plurality of biometric information measurement areas are formed in a long bar shape or a rectangular shape toward the main driver circuit.

The utility model discloses an infrared light-emitting device based on a liquid infrared quantum dot light conversion element, an imager, a diagnosis and treatment instrument and a beauty instrument. The infrared light-emitting device comprises an excitation light source, the liquid infrared quantum dot light conversion element, a light transmitting element, a refrigerating system, a light condensing element and a light guide mechanism. The liquid infrared quantum dot light conversion element is arranged on the side, emitting light, of the excitation light source, and the liquid infrared quantum dot light conversion element, the light transmitting element, the light condensing element and the light guide mechanism are sequentially arranged in the direction away from the excitation light source. The refrigerating system is arranged on the outer side of the liquid infrared quantum dot light conversion element. In the scheme of the utility model, the liquid infrared quantum dot light conversion element adopted by the infrared light-emitting equipment has higher light-emitting efficiency, and the solvent of the liquid infrared quantum dot light conversion element can also play a role in heat dissipation so as to slow down light attenuation. By arranging the refrigerating system, efficient heat dissipation is conducted on the infrared quantum dot solution, light attenuation of the quantum dot light conversion element can be effectively avoided, and stable light output of the infrared light-emitting equipment is achieved.

Embodiments of the present application provide an infrared touch scanning method and apparatus, a storage medium, and an interactive tablet. The method is applied to an infrared touch frame, the infrared touch frame comprises a plurality of side frames, infrared receivers and infrared emitters are provided in each side frame, and the infrared receivers in each side frame are divided into a plurality of infrared receiving groups. The method comprises the following steps: sequentially selecting infrared receiving groups one by one on the basis of a preset order, and controlling each infrared receiver of each selected infrared receiving group to start scanning; on the basis of each selected infrared receiving group, controlling corresponding infrared emitters to sequentially emit infrared signals; and on the basis of the infrared signals obtained by scanning of the infrared receivers, determining a touch position. Therefore, the infrared touch detection precision is improved, and the problem of touch misjudgment is reduced.

The application provides a niobium phosphate nonlinear optical crystal and preparation and application thereof. 12 Nb3P7O 31 , belongs to an orthorhombic system, a space group is Pna21, is a non-central symmetric structure, cell parameters are: a=0.5 nm, b=1.0 nm, c=0.5 nm, and Z=4, has a large nonlinear optical effect (3xKDP), is phase-matched, a theoretical indirect band gap is 5.11 eV, has a large laser damage threshold, a wide transmission range, stable physical and chemical properties, good mechanical properties, is not easy to deliquesce, and is easy to preserve, and can be used as a ferroelectric crystal, a pyroelectric crystal or a laser substrate material, and is widely applied in preparation of middle infrared laser nonlinear optical composite functional devices, piezoelectric devices, laser frequency conversion devices and the like.

The invention provides an ambient brightness detection method and an ambient brightness detection device, and the method can determine the initial brightness value of a target environment according to the pixel brightness value of each color channel in a target image and the brightness weight corresponding to each color channel, and can determine the initial brightness value of the target environment according to an infrared interference coefficient and the pixel brightness value of an infrared channel. According to the method, the infrared interference brightness value is determined according to the initial brightness value of the target image, the actual brightness value of the target environment is determined according to the initial brightness value and the infrared interference brightness value, and the situation that the actual brightness value of the target environment is inaccurate due to the influence of the infrared light is avoided by removing the influence of the infrared light in the target image on the pixel brightness value of each color channel. And the accuracy of detecting the actual brightness value of the target environment is improved.

The invention belongs to the field of target detection of images, and particularly relates to a pedestrian target detection method based on bimodal feature level fusion in an automatic driving environment. The method comprises the following implementation steps: firstly, acquiring infrared and visible light bimodal pedestrian target information in an automatic driving scene from a KAIST data set, and carrying out data preprocessing; secondly, registration is carried out on the bimodal image based on an SURF algorithm, and a better training sample is provided for subsequent target detection network training. And then, improving and training the YOLOv7 network by adopting a double-branch feature extraction strategy and a multi-stage feature interaction fusion strategy. And finally, inputting a to-be-detected image into the improved YOLOv7 target detection network for detection, extracting features under different scales, fusing the features of each stage, and inputting the fused features into a detection head for target detection. Experiments prove that the method can effectively overcome the problem of difficulty in pedestrian detection in a complex scene, keeps stable detection precision, has higher recognition precision under complex conditions, and is high in detection speed; the performance of the YOLOv7 network in processing the bimodal pedestrian target is improved, and the accuracy and efficiency of target detection are remarkably improved.