103 results about "Radiometer" patented technology

A method for estimating typhoon structural parameters by fusing spaceborne GNSS reflectometer data and radiometer data, which relates to the technical fields of data fusion and typhoon monitoring. The method comprises: acquiring GNSS-R reflectometer data and radiometer data; filtering typhoon data from the GNSS-R reflectometer data and the radiometer data to obtain filtered GNSS-R reflectometer data and radiometer data; performing data spatio-temporal matching on the filtered GNSS-R reflectometer data and radiometer data to obtain a spatio-temporally matched region; performing data fusion processing on the spatio-temporally matched region to obtain fused data; and performing typhoon structural parameter estimation on the obtained fused data to obtain structural parameters of a typhoon at each development stage. Fused data of spaceborne GNSS-R reflectometer data and radiometer data is used for typhoon structural parameter estimation, such that the temporal resolution and accuracy of parameter estimation can be improved, and the algorithm complexity is low.

A method for evaluating terrain uncertainty in flood warning and forecasting is provided. The method includes: S1, acquiring three types of digital elevation model (DEM) data from a shuttle radar topography mission (SRTM), an advanced spaceborne thermal emission and reflection radiometer (ASTER), and an advanced land observing satellite (ALOS); and preprocessing the three types of DEM data; S2, optimizing urban terrain characteristics; S3, constructing a multidimensional parameter space by using Latin hypercube sampling (LHS); S4, calculating flood hydrodynamics numerical value based on multidimensional sample points; and S5, constructing a global sensitivity analysis method frame suitable for urban terrain characteristics-related factors, where a Sobol quantitative method is used in the global sensitivity analysis method frame, and the Sobol quantitative method is used to evaluate uncertainties and sensitivity characteristics of multiple factors of terrain data based on a variance decomposition theory.

The invention discloses an optical scanning radiometer in-orbit dark background long time series data extraction method and system, and the method comprises the steps: obtaining cold air observation data and solar zenith angle data from an optical scanning radiometer, and generating a channel-level cold air observation data set and a channel-level solar zenith angle data set. According to the channel-level cold air observation data set and the channel-level solar zenith angle data set, various screening methods are adopted to generate to-be-selected schemes and screening data sets of the to-be-selected schemes. For each to-be-selected scheme, calculating a statistical mean value and data volatility based on a screening data set of the to-be-selected scheme, calculating a dark background representative value of the to-be-selected scheme, and determining a mean value sorting sequence number and a volatility sorting sequence number; and determining an optimal dark background value scheme by adopting a weighted assignment method according to the mean sorting sequence number and the volatility sorting sequence number. Therefore, according to the in-orbit dark background long-time-sequence data extraction method of the optical scanning radiometer, long-time-sequence stable extraction is achieved, and the remote sensing data radiometric calibration precision is remarkably improved.

The invention discloses a synthetic aperture radiometer darkroom phase calibration method and device. The method comprises the following steps: installing a synthetic aperture radiometer and a point target emission source in a microwave anechoic chamber; in the first-stage test, unit antenna output ports are connected with equal-length test cables and connected to a microwave test instrument, a synthetic aperture radiometer is set to be in an antenna observation mode, and a point target observation unit antenna phase difference test is carried out; in the second-stage test, the output end of the unit antenna is connected with each receiving channel of the synthetic aperture radiometer, the synthetic aperture radiometer is set to be in an antenna observation mode, and a point target observation full-system phase difference test is carried out; in the third stage of testing, the synthetic aperture radiometer is set to be in a common noise injection calibration mode, and common noise injection calibration is carried out; and calculating and counteracting a near field effect phase difference, a unit antenna phase difference and a receiver channel phase difference to obtain an accurate noise distribution network phase difference parameter. Darkroom phase calibration is achieved under the near-field condition, the result is accurate, and the method is simple, convenient and practical.

The invention provides a portable low-cost millimeter wave radiation imaging system and system. The system comprises a millimeter wave radiometer, an IMU module, a range finder, an optical camera, an acquisition module, a wireless transceiver module, a power supply module, an equipment appearance tool, client equipment and a detachable portable support rod. The millimeter wave radiometer is used for acquiring a millimeter wave radiation brightness temperature value of an observation scene, the IMU module is used for acquiring azimuth angle and pitch angle information of the meter wave radiometer, the range finder is used for acquiring the distance to the observation scene or a target, and the optical camera is used for acquiring an optical image of the observation scene; synchronously acquiring the data through an acquisition module; the collected data is transmitted to client equipment through the wireless receiving and transmitting module; performing two-dimensional uniform interpolation on the non-uniform azimuth angle and pitch angle on the client device; performing corresponding interpolation processing on the millimeter wave radiation brightness temperature value to generate a homogenized millimeter wave radiation image; and performing registration and fusion display on the millimeter wave radiation image and the optical image.

To provide a radioactive material monitoring device capable of accurately detecting the concentration of radioactive materials in a liquid to be detected. [Solution] A radioactive material monitoring device comprising a flow channel through which a liquid to be detected flows, a counter unit that counts signals based on radiation generated from within the flow channel, and an analysis unit that calculates the concentration of radioactive material in the liquid to be detected based on the radiation count rate obtained from the counter unit, wherein the analysis unit includes a background correction unit that calculates a background value from the count rate based on the volume of the liquid to be detected in the flow channel and the count rate obtained from the counter unit, and a concentration calculation unit that calculates the concentration of radioactive material in the liquid to be detected based on the background value calculated by the background correction unit and the count rate obtained from the counter unit.

The invention provides a synthetic aperture radiometer radio frequency interference detection method and system based on sub-band brightness temperature. The method comprises the following steps: sorting all brightness temperature data along a sub-band sequence; traversing all the sub-bands, performing fixed threshold detection on brightness temperature data of each sub-band, and marking detected radio frequency interference as abnormal; traversing all the sub-bands, performing two-dimensional airspace radio frequency interference detection on the brightness temperature of each sub-band, and marking the detected radio frequency interference as abnormal; and centralizing the brightness temperature of each sub-band, and then performing threshold detection on the absolute value of the centralized brightness temperature data of each sub-band to obtain the brightness temperature of the sub-band after radio frequency interference suppression. The method has the advantages that the method can be embedded into a real-time radio frequency interference detection module of a satellite-borne synthetic aperture radiometer, brightness temperature data of multiple sub-bands are jointly processed, the method has the advantages of simple steps and high detection capability, and most radio frequency interference presented by the brightness temperature of the sub-bands can be effectively detected.

The application discloses a kind of inclined surface hourly solar radiation calculation method and related equipment, belong to solar energy resource assessment and building energy saving technical field.The method includes: obtaining horizontal plane solar radiation data and space-time information, and the inclination and azimuth of target inclined surface;Calculate solar elevation angle, solar incidence angle, clear sky index and horizontal plane scattering radiation ratio;Two scattering radiation conversion coefficients are obtained by using two basic models respectively;At least according to clear sky index, horizontal plane scattering radiation ratio and solar incidence angle to determine dynamic weight;Two scattering radiation conversion coefficients are weighted and summed with dynamic weight, to obtain combined scattering radiation conversion coefficient, and then obtain inclined surface hourly solar total radiation.The method is combined by dynamic weight based on weather state and solar position real-time change to two basic models with obvious difference in weather adaptability, overcome the limitation that single model is only accurate under certain weather, and does not depend on multi-regional long-term measured data, improve the calculation accuracy and applicability under all weather types.

The invention relates to a radiation meter dense feed source array directional diagram optimization method based on a generative adversarial network. The method comprises the following steps: constructing a training data set, a condition vector containing a target directional diagram performance index and a corresponding optimal amplitude-phase weight vector; designing a conditional generative adversarial network model; constructing a physical constraint loss function by embedding a differentiable electromagnetic calculation module; loading the constructed training data set, and training a complete generative adversarial network model based on a loss function embedded with a differentiable electromagnetic calculation module; and when the system antenna pattern obtained according to the amplitude-phase adjustment parameters output by the generative adversarial network model meets the antenna pattern evaluation index, completing dense feed source array antenna pattern optimization. According to the method, the target weight is dynamically adjusted and optimized on orbit, so that a single model can adapt to beam forming requirements in different observation scenes, and flexible switching of multiple task modes such as high-resolution detection and wide-range general survey is realized.

According to the low-frequency ultra-wideband detection system and method based on the digital multi-beam push-broom radiometer, a low-frequency ultra-wideband microwave radiation signal from sea surface radiation is received, polarization separation is carried out on the low-frequency ultra-wideband microwave radiation signal, then a low-frequency ultra-wideband polarization signal is output, and then the polarization signal is processed; the intermediate frequency signals are subjected to data acquisition and synthesized into digital beams, the digital beams are subjected to related processing to obtain remote sensing data, instantaneous large-width and high-sensitivity detection can be achieved, and the obtained remote sensing data are used for high-precision ocean salinity and temperature detection.

The utility model provides a miniaturized Bluetooth wireless transmission module, a radiometer probe and a radiation detector, and relates to the technical field of radiation detectors. The module comprises a shell, wherein the shell is provided with an accommodating cavity; the main board is provided with a needle hole, and the main board is arranged in the containing cavity; the wireless unit comprises a Bluetooth module and an antenna, the wireless unit is electrically connected with the mainboard, and the wireless unit is used for communicating with the outside; the front part of the aviation plug is used for connecting external equipment, the rear part of the aviation plug is provided with a contact pin, and the contact pin is inserted into the pin hole and is fixed with the mainboard; and the battery is electrically connected with the mainboard. According to the miniaturized Bluetooth wireless transmission module, the communication between the host and the probe can be ensured, the space is greatly saved, and the detection operation is more facilitated. And the radiation detector and the detector probe can fundamentally solve the problem that a spring wire is easy to damage through matching with a miniaturized Bluetooth wireless transmission module, and solve many problems caused by the spring wire, thereby ensuring normal use.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the quantum coherence effect of Rydberg atoms with a wave-shaped structure. The device includes: a microwave standard radiation system, a dynamic ring track, a Rydberg atom electric field measurement system, a radiometer receiving antenna, a data acquisition and control system, and a data processing system. The device uses the dynamic ring track to move the microwave transmitting antenna, causing microwave electromagnetic signals to alternately irradiate the Rydberg atom electric field measurement system and the radiometer receiving antenna. The interaction between the microwave electric field and specific Rydberg energy levels induces the Euler-Townes effect, causing energy level splitting and resulting in peak position evolution in the electromagnetically induced transparency spectrum of the atomic laser system. The data processing system calculates the electric field intensity and converts it into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna.

The application discloses a target detection method and system based on radar and radiometer cooperative sensing, and belongs to the technical field of target detection, which comprises the following steps: S1, acquiring a first source image and a second source image obtained by respectively detecting a same scene by using a radar sensor and a radiometer sensor; S2, after pre-processing the first source image and the second source image, performing target detection to obtain a first target image and a second target image; and S3, after fusing the first target image and the second target image, obtaining the position of a real target. The application considers that the radar sensor has the characteristics of high resolution and distance measurement, and the radiometer sensor has the characteristics of resisting interference from corner reflector and the like, target detection is performed on the imaging results of the radar and the radiometer, and then the radar and the radiometer are fused, the difference of information obtained by different sensors can be fully utilized, complementation between information is realized, the anti-interference capability of detection is improved, and therefore the accuracy of target detection is effectively improved.

The embodiment of the present disclosure provides a method, device, equipment and computer storage medium for obtaining a high-resolution image. The method for obtaining a high-resolution image comprises: reconstructing input Gaussian white noise through an image depth prior network to obtain a transient output result; under the constraint of a loss function, performing convolution on the transient output result and input known blur kernel to obtain first low-frequency channel brightness temperature information, which is matched with the input degraded image; through a gradient loss function, extracting gradient information of a high-frequency channel, and making the gradient information of the first low-frequency channel brightness temperature information and the gradient information of the high-frequency channel matched, thereby obtaining an enhanced high-resolution image. Through the processing scheme of the present disclosure, under the zero sample method, the training set is not restricted by the scarcity and type mismatch, the extremely high detail satellite radiometer undegraded low-frequency channel brightness temperature data is recovered, and the enhanced high-resolution image is obtained.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the Rydberg atomic quantum coherence effect. The device includes: a microwave standard radiation system, a parabolic reflector (5), a Rydberg atomic electric field measurement system (1), a radiometer receiving antenna (3), a data acquisition and control system (6), and a data processing system (14). The microwave electromagnetic signal from the microwave transmitting antenna (4) is reflected by the parabolic reflector (5), so that the microwave electromagnetic signal alternately irradiates the Rydberg atomic electric field measurement system (1) and the radiometer receiving antenna (3). The interaction between the microwave electric field and a specific Rydberg energy level causes the Euler-Townes effect energy level splitting, resulting in a peak position evolution of the electromagnetically induced transparency spectrum in the atomic laser system. The data processing system (14) calculates the electric field strength and converts the electric field strength into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna (3).

The invention relates to the technical field of electric power engineering, in particular to a high-voltage alternating-current overhead line electromagnetic radiation calculation method. The method comprises the following steps: S1, deploying electromagnetic field sensor nodes at fixed intervals along a high-voltage overhead line based on an electric field attenuation model, and dynamically coupling multi-dimensional environmental parameters to optimize the electric field attenuation model in consideration of the influence of the precision of the electric field attenuation model in a complex environment; s2, predicting the electric field intensity of any point in the space according to the input parameters by using a CNN-LSTM combined model; and S3, according to the predicted electric field intensity and the conduction current density change, calculating the conduction current density and evaluating the potential risk to the human body. By constructing an electric field attenuation model, the electric field intensity of a single wire and a multi-wire system at any point in the space can be accurately calculated. Multi-dimensional environmental parameters such as atmospheric pressure and solar radiation are introduced to optimize the electric field attenuation model, so that the precision of the model in a complex environment is improved.

The invention discloses a stationary satellite surface emissivity collaborative inversion method based on background field reconstruction, and belongs to the technical field of satellite remote sensing information processing, and the method comprises the steps: constructing a background field of surface temperature and atmospheric temperature space structure collaborative constraint, employing a three-dimensional variational assimilation cost function to assimilate the actually measured surface temperature of a surface meteorological observation station, and calculating the surface emissivity of a stationary satellite. The obtained surface temperature analysis field is used as a surface temperature initial guess field for inverting surface emissivity by a one-bit variation inversion cost function; generating a ground surface emissivity background field by using the ground surface emissivity in the ground surface element historical data set, and constructing a ground surface item background error covariance matrix capable of representing a coupling relationship between the ground surface emissivity and the ground surface temperature based on the ground surface element historical data set so as to construct a one-dimensional variation inversion cost function; and the inversion of the surface emissivity can be realized by combining the satellite observation brightness temperature of the clear sky observation pixel observed by the infrared window area channel of the stationary orbit radiation imager, so that the inversion level of the surface emissivity is improved.

The embodiment of the invention provides a signal demodulation method and device, electronic equipment, a storage medium and a product. The method comprises the following steps: receiving a signal demodulation request, wherein the signal demodulation request comprises a modulation signal of noise carrier communication; according to the signal demodulation request, the modulation signal is input into the radiometer, a voltage waveform signal is obtained, and the voltage waveform signal is used for representing the instantaneous power of the modulation signal through the average voltage; obtaining a target response characteristic parameter of an integrator of the radiometer; and inputting the voltage waveform signal and the target response characteristic parameter into a pre-trained deep neural network model to obtain a demodulation signal, the deep neural network model being used for dynamically adjusting the weight of the characteristic in the voltage waveform signal according to the target response characteristic parameter so as to compensate the influence characteristic of the integrator response characteristic in the voltage waveform signal. According to the scheme, distortion caused by the response characteristics of the integrator of the radiator is compensated through the pre-trained deep neural network model, so that the accuracy of signal demodulation is improved.

The utility model discloses an optical radiometer, relates to the technical field of spectral radiometers, and aims to solve the problems that in the prior art, most of shells of existing spectral radiometers are of integral structures, when internal components of the shells are damaged, a shell cover on the shell needs to be detached by a screwdriver, then an internal circuit board is taken out, and the cost is high. And the use and the operation are very inconvenient. Side sliding plates are slidably connected to the two sides of the shell correspondingly, sliding grooves are formed in the upper sides and the lower sides of the side sliding plates correspondingly, embedded strips are arranged on the inner side of the shell and connected with the sliding grooves in an engaged mode, a protection plate is arranged at one end of each side sliding plate, a handle is welded to the front end face of each protection plate, and a shell cover is fixedly connected to one end of the shell. A heat dissipation groove is formed in the inner side of the side sliding plate, a display screen is arranged on the front end face of the shell cover, a pressing head is slidably connected to the shell, a supporting foot is arranged at the lower end of the pressing head, a clamping leg is fixedly installed at the bottom of the supporting foot, and a clamping groove is formed in the inner side of the side sliding plate.

The invention discloses a synthetic aperture interference radiometer target positioning method and system based on spatial frequency domain data recovery, and belongs to the technical field of target positioning. Comprising the following steps: S1, establishing a corresponding relationship between an antenna array and a spatial frequency domain baseline, constructing a visibility-missing binary model and a covariance matrix, and establishing a corresponding relationship between a visibility-missing spatial frequency domain and a visibility sample; s2, realizing local recovery of visibility data by using a kernel interpolation algorithm assisted by total variation regularization aiming at visibility on a spatial frequency domain, and obtaining a recovery matrix according to a corresponding relation; s3, according to the characteristics of the recovery matrix, an improved reweighted nuclear norm and L1 norm minimization method is adopted to reconstruct a recovered covariance matrix; and S4, using a subspace class algorithm to complete target position estimation on the covariance matrix after joint reconstruction. According to the invention, the target positioning performance of the radiometer can be effectively improved under the condition of lack of visibility data.

The invention provides a low-resistance silicon-based temperature-measurable terahertz waveguide load device applied to internal calibration of a radiometer. The low-resistance silicon-based temperature-measurable terahertz waveguide load device comprises a waveguide load composed of a load wave-absorbing material and an open waveguide, the load wave-absorbing material is of a cylindrical structure with a parallelogram-shaped cross section; the open waveguide comprises a waveguide transition output port, a waveguide turn and an input waveguide which are connected in sequence; one side surface of the waveguide upper cavity is tightly attached to one side surface of the waveguide lower cavity, and the waveguide load is packaged in the waveguide upper cavity; one side face of the load rear cover is tightly attached to the side faces of the waveguide upper cavity and the waveguide lower cavity, and the load rear cover compresses the load wave-absorbing material; the first temperature measuring sensor is fixed between the load rear cover and the waveguide upper cavity and the waveguide lower cavity and is close to the load absorbing material; and the second temperature measurement sensor is fixed on one side, far away from the waveguide upper cavity, of the load rear cover. The method has the advantages that the conductivity of the silicon wafer and the thickness of the silicon wafer can be adjusted through the doped carrier concentration, and the wave absorbing performance is controlled.

The invention discloses a reservoir evaporation control method integrating evaporation rule analysis and dispatching scene simulation, and relates to the field of reservoir control. A main dam area remote sensing point, a water inlet area remote sensing point and a branched branch shallow bay area remote sensing point serve as representatives to achieve microclimate three-dimensional heterogeneous coverage, and high frequency of water evaporation driving factors can be achieved in combination with a total radiometer, an aerosol laser radar, a layered temperature and humidity probe and other multi-type sensor sets. And carrying out time sequence sampling once in 5 minutes and carrying out spatial distinguishing identification on local disturbance behaviors. Compared with an intermittent measurement mode depending on a single-point water surface evaporation dish or a meteorological station in the prior art, the method has the advantages that the environmental basic data integrity of evaporation behavior prediction is remarkably improved, high-resolution input conditions are provided for subsequent heat flux modeling and feedback control, and the method has the dual technical advantages of precision and real-time performance.

The application discloses a prediction method for radiation refrigeration capacity by using aerosol optical thickness and precipitable water amount, comprising the following steps: S10, obtaining corresponding hourly weather data according to weather data; S20, judging whether the local latitude is greater than 33°, if yes, entering step S30, S30, calculating the local precipitable water amount (PWV H ) by using a high-latitude calculation method; if no, entering S40, S40, calculating the local precipitable water amount (PWV L ) by using a low-latitude calculation method; S50, calculating atmospheric radiation according to the calculated precipitable water amount (PWV H or PWV L ); S60, correcting the atmospheric radiation calculated in S50 according to the aerosol optical thickness in the weather data; and S70, calculating the radiation refrigeration capacity according to the atmospheric radiation corrected in S60.

This invention discloses a converging optical path for a solar spectroradiometer and its coaxial adjustment method, relating to the field of atmospheric measurement devices. The converging optical path includes a tracking optical tube and a measuring optical tube. The tracking optical tube consists of a pinhole, an adjustment mechanism, a four-quadrant detector, and an amplification and acquisition circuit. The measuring optical tube consists of a window, an aperture diaphragm, an off-axis parabolic mirror, a field-of-view diaphragm, a stray beam diaphragm, a meniscus lens, a neutral density filter, and a spectrometer. The method constructs a normalized evaluation index by acquiring a weighted integral sum of continuous spectral intensity from four quadrant signals and multiple preset reference bands (2–6 micrometers). A local five-point cross scan is performed centered on the current lock point to determine the optimal coaxial point and obtain target locking characteristics. Coaxial adjustment is triggered again upon power-on or when the evaluation index decreases. This invention improves the consistency between the measuring and tracking optical paths and the stability of direct-light measurements.

The application provides a sub-band brightness temperature-based synthetic aperture radiometer radio frequency interference detection method and system, which comprises the following steps: sequentially ordering all brightness temperature data along sub-bands; traversing all sub-bands, performing fixed threshold detection on each sub-band brightness temperature data, and marking the detected radio frequency interference as abnormal; traversing all sub-bands, performing two-dimensional spatial radio frequency interference detection on each sub-band brightness temperature, and marking the detected radio frequency interference as abnormal; centering each sub-band brightness temperature, and then performing threshold detection on the absolute value of each sub-band centered brightness temperature data to obtain sub-band brightness temperature after radio frequency interference suppression. The application has the advantages that it can be embedded in a real-time radio frequency interference detection module of a satellite-borne synthetic aperture radiometer, the brightness temperature data of multiple sub-bands are jointly processed, it has the advantages of simple steps and strong detection capability, and it can effectively detect most radio frequency interferences presented by sub-band brightness temperature.

The invention provides a material sample millimeter wave emissivity measuring system based on an integrating sphere, which belongs to the technical field of passive microwave / millimeter wave remote sensing and detection and comprises the integrating sphere, a radiation source, a to-be-measured sample table and a radiometer antenna or a whole machine, the radiation source is arranged on the inner side of the sphere wall of the integrating sphere; the to-be-tested sample table is arranged in the integrating sphere; a flange is arranged on the outer side of the ball wall of the integrating sphere, the radiometer antenna or the whole machine is arranged on the ball shell of the integrating sphere through the flange and is aligned with the to-be-tested sample table, and the readings of the radiometer at different angles are obtained by adjusting the position of the radiometer antenna or the whole machine on the ball shell of the integrating sphere, so that the emissivity of the material sample at different angles is calculated. The device and the method can be suitable for measuring millimeter wave band emissivity of material samples with different surface forms and different temperatures, the emissivity value of the material sample can be obtained without measuring the material temperature and the environmental radiation brightness temperature, and the device and the method are high in measurement accuracy, convenient to operate and high in practicability.

The application discloses a method for selecting optimal stealth coating layer materials of metal observation objects in different environments, and comprises the following steps: S1, physically modeling a detected scene; S2, obtaining a three-dimensional dissection model of the detected scene; S3, forming a brightness temperature graph; S4, recording the surface number of the surface needing to be coated with a stealth coating layer; S5, coating the surface found and recorded in step S4 with a stealth coating layer; S6, repeating step S3 and recording the average incident angle of the tracking ray of the surface needing to be coated; S7, assuming the coating layer as an ideal smooth surface and drawing a contour graph; S8, extracting the contour graph drawn in step S7 through software; S9, statistically processing the target radiation cross-sectional area parameters of the coating surface after brightness temperature inversion each time; S10, selecting the dielectric constant of the coating layer of the corresponding grade; S11, comparing with a brightness temperature imaging graph of a metal observation object without a coating medium; and S12, observing and statistically processing the influence of the observation angle of a millimeter wave radiometer on the selection of the stealth coating layer.

The application relates to a surface infrared emissivity measuring device based on double-blackbody alternating radiation, which mainly comprises a first cavity blackbody, a second cavity blackbody, a chopper, a shell, a cooling pipeline, a cooler, an infrared thermal imager, an infrared spectral radiometer and a processor. The shell is used for mounting the first cavity blackbody, the second cavity blackbody and the chopper, the chopper is used for intermittently shielding the radiation of the radiation cavity mouth to the measured member, and the first cavity blackbody and the second cavity blackbody realize the alternating radiation to the measured member. A cooling passage is arranged in the blade and is used for cooling the blade. The application realizes the rapid switching of the blackbody temperature by rotating the blade of the chopper; two constant-temperature cavity blackbodies are adopted, the time required for temperature rising is saved, the emissivity measuring efficiency is improved, non-contact large-area measurement is realized, the surface infrared emissivity of the coating region of the aircraft to be measured can be obtained through one-time measurement process, and the coating damage condition can be intuitively recognized.

The present application relates to the technical field of irradiance measurement, and more particularly to a radiation meter absorption cavity temperature bistable control method based on adaptive Smith predictor, which combines feedforward control, PI control and adaptive Smith predictor: feedforward control is performed on the absorption cavity temperature interference source in the measurement process, an adaptive Smith predictor is used to predict the behavior of the radiation meter absorption cavity, PI control is used to complete the electric heating output of the radiation meter absorption cavity, the output of the temperature controller and the controlled cavity temperature are quickly adjusted, and the stable state is simultaneously entered, and high-precision radiation meter absorption cavity temperature and stable electric heating output meeting the measurement accuracy requirement are obtained.