48 results about "Solar radio" patented technology

The invention discloses a solar radio burst spectrum device based on a high speed AD acquisition card to analyze and study solar radio burst at different time and frequency resolutions. The system comprises a parabolic antenna, a low noise amplifier, the high-speed AD acquisition card, a computer, a high-speed solid state hard disk, c language processing software, FPGA internal threshold judgment software, Matlab processing software and labview processing software. The device amplifies a solar radio signal and sends the signal to the FPGA in AD conversion digital quantity. The sum of the power spectrum is acquired. When the sum is greater than a set threshold value, solar radio burst occurs, and the system intensively collects data. When the sum is less than the threshold value, solar radio burst does not occur, and the system sparsely collects data. The data are uploaded to a computer through a PCIe interface and are stored in the solid-state hard disk. At night, FFT operation of different length is carried out on the stored data to acquire a solar radio burst intensity graph at different time and frequency resolutions.

The present invention discloses a research and early warning platform for influence on navigation signals caused by solar radio burst, and a method of the research and early warning platform. The research and early warning platform comprises a solar radio flow monitoring part, a navigation satellite signal monitoring part and a computer; the solar radio flow monitoring part comprises a radio antenna, an analog receiver system, a calibration system, more than three power-voltage convertors and a data acquisition device; the navigation satellite signal monitoring part includes a navigation antenna and a navigation signal receiver; the solar radio flow monitoring part realizes precise calibration of multi-channel solar radio flow through real-time monitoring on solar radio flow and switching of a noise source, so as to judge whether a solar radio burst event occurs; the navigation satellite signal monitoring part is used for recording information such as current signal quality; and based on solar radio flow data and navigation signal quality data, influence on signal quality caused by the solar radio burst can be judged.

The invention discloses a fluorene copolymer and a preparation method, application and a polymer solar cell device thereof. The copolymer is prepared from raw materials of 2,7-fluorene monomers, thiophene monomers and diazosulfide monomers by performing Suzuki polymerization reaction under the action of a catalyst and alkali. The fluorene copolymer can be applied to the manufacturing of polymer solar cells, organic electroluminescent devices, organic field-effect transistors, organic optical memory devices, organic nonlinear materials or organic laser devices. The polymer solar cell device comprises a glass layer, an ITO layer, a PEDOT:PSS composite layer, an active layer and an Al layer, wherein the active layer comprises electron donor materials and electron acceptor materials of the fluorene copolymer. The fluorene copolymer and the application thereof have the advantages of relatively wide spectral response, relatively high stability, better match with solar radio spectrum and high photoelectric conversion efficiency.

The invention provides a solar radio total power radiometer system in radio astronomy protection frequency band based on a broadband detection chip. The system works in the radio astronomy protection frequency band and carries out filtering, gating, amplification, detection and analysis on frequency band signals. The system is characterized in that the system is formed by connecting a calibration module and a control unit thereof with a radio-frequency signal detection unit. The beneficial effects of the system are that the system has the advantages that the system receives less radio interference; and compared with a conventional superheterodyne mode, the detection broadband is wider and large in dynamic range, and the structure is simple and the like.

The invention discloses a satellite-borne very low frequency solar radio observation system. The system is used for observing a low frequency solar radio signal of 20-100 MHz. The system comprises three electric field sensors, three sets of analog receivers, a data acquisition and processing module,a time frequency module, a power module and a storage module, wherein the three electric field sensors are respectively connected with the three sets of analog receivers; the three sets of analog receivers and the time frequency module are respectively connected with the data acquisition and processing module; the data acquisition and processing module is connected with the storage module; and the data acquisition and processing module and the three sets of analog receivers are respectively connected with the power module. The system disclosed by the invention can judge the motion of coronal projectiles, predict and anticipate the future space weather event.

The invention discloses a superheterodyne solar radiometer system for a radio astronomical protection frequency point. The superheterodyne solar radiometer system comprises an analog receiver subsystem, a detection-digital collection subsystem, a calibration subsystem, a time frequency subsystem and a control subsystem, wherein the analog receiver subsystem is connected with the control subsystem via the detection-digital collection subsystem; the calibration subsystem and the time frequency subsystem are respectively connected with the control subsystem. The system has the advantages of less radio interference, large dynamic range, simple structure and the like, is applied to multi-point frequency solar radio flow precision observation, and effectively speculates a spatial weather event via observation data.

The invention discloses an FPGA-based data compensation system and method for multi-channel frequency conversion of a solar radio observation system. Data of all channels of a frequency conversion card are received and the data are transformed into digital data; FFT operation is carried out on the digital data of each channel to obtain frequency domain data of each channel; errors of amplitude frequency characteristics and phase frequency characteristics among all channels of the frequency conversion card are measured, and a correction coefficient of each frequency point is calculated; and with the correction coefficients, all frequency point data of each channel are corrected. According to the invention, the differences of amplitude frequency characteristics and phase frequency characteristics of all channels of the mixer are measured and the FPGA compensates the amplitude frequency characteristics and phase frequency characteristics of all frequency points, so that non-uniform errorsof the amplitude frequency characteristics and phase frequency characteristics of all channels are reduced; the amplitude frequency characteristics of all frequency points are compensated to be an ideal consistent curve at the computer; and the measurement accuracy of the solar radio observation system is improved.

The invention discloses a rapid pre-warning system for an event that navigation communication is interfered by solar radio burst. The system comprises a transmitting device integrated with a monitoring satellite, and a receiving device and a signal gain adjustment device integrated with a navigation communication satellite. The signal gain adjustment device is integrated with the navigation communication satellite. The transmitting device integrated with the monitoring satellite is composed of a plurality of X-ray detectors with amplifier circuits, a signal processing system, a signal transmitter and a transmitting antenna which are connected in sequence. The receiving device integrated with the navigation communication satellite is composed of a receiving antenna and a signal receiver which are connected. The transmitting antenna is connected with the receiving antenna. The signal receiver is connected with the signal gain adjustment device. According to the system, in a solar high energy observation plus inter-satellite rapid pre-warning mode, pre-warning information can be accurately and rapidly transmitted to satellites such as navigation and communication satellites which arepossibly influenced, and the condition that a signal carrier-to-noise ratio is influenced can be effectively improved.

The invention discloses a system for eliminating interference on navigation signals by solar radio burst based on an auxiliary antenna, which comprises a ground station main antenna, an auxiliary antenna system, more than three filters, more than three controllable phase shifters, a combiner, and a computer, wherein the ground station main antenna and the auxiliary antenna system are respectively connected with the controllable phase shifters through the filters respectively; the output ends of the more than three controllable phase shifters are connected with the input end of the combiner; and the combiner is connected with the computer. The device adopts a scheme of adding the auxiliary antenna system, a zero point can be formed on a combined pattern, the zero point is aligned to the sun direction, the solar radio burst signals are greatly attenuated under effects of the zero point, and influences on the navigation signals by burst signals are thus reduced.

The invention discloses a signal self-adaptive interception method and system of a solar radio observation system. The method comprises the following steps: setting an initial interception and a comparison threshold value according to an observation signal when the sun radiates quietly; taking an average value of the observation signals in the solar radio burst time period after maximum absolute value cumulative average processing as a solar energy upper limit value of the current time period; and according to a comparison result of the upper limit value of the solar energy quantity and the comparison threshold, adjusting the digit of the current interception bit to obtain an effective data bit required by the solar radio observation system so as to observe the solar radio. According to the energy difference, observed by a solar radio observation system, between a quiet solar radio state and a solar radio burst state, cut-off changes are controlled by comparing the upper limit value ofsolar energy in the current time period with a threshold value, so that high-precision observation of solar signals with different intensities is realized.

The invention discloses a radio-technology-based solar radio current quantity monitoring system and method. The system is composed of an antenna, a radio board and a computer. The antenna is configured to receive a solar radio signal and transmit the signal to the radio board; the radio board is configured to carry out frequency conversion on the received solar radio signal to obtain a baseband signal, convert the baseband signal into a digital signal, filter the digital signal, and upload the processed signal to the computer; and the computer is configured to carry out preprocessing and spectrum analysis on the received signal and display an analysis result by means of a spectrogram, a dynamic spectrogram or a radio current graph. Therefore, monitoring and displaying of the multi-band solar radio signals are realized; the development cost is low; and the application range is wide.

The invention discloses a solar radio burst detection method based on a GPS/BDS carrier-to-noise ratio decrease. The method detects, by means of the influence of solar radio bursts on the GPS/BDS carrier-to-noise ratio, the solar radio burst, and accordingly determines whether the solar radio burst occurs. In this process, the solar elevation of an observation site is firstly calculated and data is preprocessed. Then, a falling point and a rising point are selected out to determine the trough time interval of a single satellite at a single observation sit. Finally, a detection result of the solar radio burst is determined in combination with a plurality of satellites and a plurality of observation sites. The detection method does not depend on a radio telescope, has a high recognition rateand low cost, and can perform real-time monitoring around the clock.

The invention relates to a solar radio, comprising a radio body and a solar panel set outside the shell of radio body, the radio body is power-supplied by solar battery; the radio is provided with a plurality of solar panels which are slidely connected. The solar radio has advantages of sufficient collecting of light energy, good waterproof and dustproof performances, significant reduction of power consumption by using IC and extension of the service life of the battery.

The invention discloses a solar radio spectrum analysis method and system based on a multi-channel FFT algorithm. The method comprises the following steps: acquiring a solar radio signal; and converting the received solar radio signal based on the multi-channel FFT algorithm to obtain a solar radio frequency spectrum. The FFT step comprises the process: 1, carrying out transverse FFT, and carryingout fusion processing to obtain four paths of 2048-point FFT results; and 2, transposing the four paths of 2048-point FFT results, constructing a 2048-row and 4-column data matrix, simultaneously carrying out transverse FFT conversion and matrix conversion on each row, and outputting a complete frequency spectrum sequence. The problem of high-speed multichannel parallel data FFT conversion is solved. A two-dimensional FFT algorithm is divided into two steps; in the first step of transverse FFT transformation, 4N-point FFT transformation is achieved through N-point FFT transformation, and thenumber of rows of the matrix is reduced to one fourth of the number of rows in the prior art; and in the second step of longitudinal FFT algorithm, the utilization efficiency of hardware resources isimproved.

The invention discloses a radio astronomical receiver and a signal flatness compensation method thereof. The method comprises the steps that the radio astronomical receiver receives a radio frequencysignal generated by a signal source; amplification filtering processing and digital processing are sequentially carried out on the radio frequency signal to obtain a processed signal; and influence ofstability unevenness on the digitalized signal is eliminated, influence of random unevenness is reduced, and further the radio astronomical receiver compensates the signal flatness. The signal flatness compensation method based on rear-end software real-time compensation is provided for solving the problem that a solar radio observation system has large difference in response to signals with thesame power and different frequencies, and the problem that signals of the solar radio observation system are uneven is specially solved.

The invention discloses a solar radio filtering method and system based on an improved LSTM network; the method comprises the steps: obtaining radio channels needing to be processed, and selecting a set number of channel data before a solar burst event for each radio channel; preprocessing the channel data, and extracting the data by using a segmented sliding window; and inputting the extracted data into a trained recurrent neural network model based on a digital mapping method, and outputting a solar radio prediction value during solar burst, wherein the recurrent neural network model based on the digital mapping method regards numerical values appearing in the sequence as different classes, and the output predicted value is the numerical value with the maximum prediction probability in the classification. According to the method, a recurrent neural network structure based on a digital mapping method is provided, before data enters the network, single-frequency channel radio data is classified, mapping of time periods to time points is established, the accuracy of prediction results is greatly improved, and possibility is provided for solar spectrum lossless filtering.

The invention relates to a solar radio with a sound box. The solar radio comprises a main machine, a broadcasting module, a loudspeaker, a single chip microprocessor, a solar panel and a storage battery, wherein the loudspeaker and a control panel are arranged on the front side of the main machine, a microphone is arranged on the rear side of the main machine, an external interface is also formed in the rear side of the main machine, the upper end of the main machine is connected with the solar panel through a control motor, the control motor is connected with the single chip microprocessor, and the single chip microprocessor is arranged inside the main machine. The solar radio has characteristics that a power supply is not needed, centralized control is not needed, a timing broadcasting function is realized and the like and is a novel combined product integrating the radio, the sound box and the loudspeaker; the single chip microprocessor can control the solar panel to change the direction through the control motor by setting a program, the direction of the solar panel can be changed at will along with the direction of the sun, and the energy conversion rate is increased. The solar radio is compact in structure, small in size and convenient to use; moreover, the solar energy is used as the energy source, so that the solar radio is clean and pollution-free.

The invention discloses a solar radio radiometer, a frequency spectrum observation system and a control method. According to the technical scheme, the solar radio radiometer comprises a selector switch, an amplifier I, a filter I, a frequency mixer, an amplifier II, a filter II, an analog-digital converter, an FPGA signal processing module and an upper computer which are connected in sequence, wherein the change-over switch is connected with two different reference loads to provide brightness temperature calibration, and the change-over switch is connected with the antenna and adjusts the output frequency or duty ratio of the antenna and the reference source according to balance judgment. The invention aims to solve the problems of sensitivity reduction caused by structural gain of a solarradio radiometer observation system and time resolution reduction caused by integration in radio astronomy. An improved zero-balance discal observation structure is provided, the improved zero-balance discal observation structure can be used as spectrum observation equipment and can also be used for radiometer observation, a calibration principle and a calibration process are provided, the integral bandwidth can be flexibly adjusted, Meanwhile, the time resolution of the spectrum and radiometer original data is ensured in a sliding integral form.

The invention discloses a solar radio storm intensity judgment method based on an SVM multi-classification algorithm. The basic principle of the SVM multi-classification algorithm is that for a multi-classification problem, every two types are combined into a binary classifier, for each binary classifier, an optimal hyperplane is found out, samples are divided into two types, and finally a classification result is obtained through a voting statistics method. In the process, firstly, data capable of reflecting the solar radio storm intensity of an observed earth satellite are extracted, data preprocessing is carried out, a feature vector is obtained, and the solar radio storm intensity type is marked. And the samples are input into an SVM classifier for learning to obtain an optimal classifier. And when the new feature vector enters the classifier, automatic classification is carried out. The determination method can automatically determine the solar radio storm intensity type, is highin efficiency and accuracy, does not depend on a radio telescope, and is low in cost.

The invention discloses a solar radio storm detection method based on a support vector machine model, the support vector machine is a binary classification model, and the geometric interval from a sample point closest to a hyperplane to the plane can be maximized. According to the method, whether the solar radio storm occurs or not is judged by utilizing the influence of the solar radio storm on the GPS/BDS signal carrier-to-noise ratio, the positioning error, the geometric accuracy factor and the satellite lock loss in combination with an SVM classification algorithm. In the process, firstly,the carrier-to-noise ratio of an observation earth satellite, positioning errors in three directions, geometric accuracy factors and the number of unlocked satellites are input; data preprocessing isconducted; feature vectors are obtained; and whether solar radio storms happen or not is marked. And inputting the samples into an SVM classifier for learning to obtain an optimal classifier. And when the new feature vector enters the classifier, automatic classification is carried out. The determination method can realize all-weather detection, is high in efficiency and simple in process, does not depend on a radio telescope, and is low in cost.