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70results about How to "Synchronization" patented technology

Low voltage grid-connected detection device and method of distributed new energy power generation system

ActiveCN103323711ARating results are accurateComprehensive ratingElectrical testingTransformerNew energy
The invention relates to a low voltage grid-connected detection device and method of a distributed new energy power generation system. The low voltage grid-connected detection device comprises a signal gathering module, a signal modulation module, a master control module, a wireless communication module and a grid-connected control module. The signal gathering module comprises six alternating voltage transformers, three alternating current transformers and a direct voltage transformer. The signal modulation module comprises a three-phase filter circuit, a three-phase voltage modulation circuit, a three-phase current modulation circuit and a zero cross detection circuit. The master control module comprises a comparator and a DSP processor, wherein the comparator comprises a voltage comparator, a phase angle comparator and a frequency comparator. A new energy power generation system grid-connected rank function is built by a multiple linear regression model, the new energy power generation system grid-connected rank function synthesizes eight parameters relative to the quality of electric energy, and therefore obtained rating results are more accurate and comprehensive. According to the low voltage grid-connected detection device and method, detection results are uploaded to a power grid dispatching center by the wireless communication module in time, the plug-and-play characteristic is achieved, and the grid-connected rate of the distributed new energy power generation system is improved.
Owner:NORTHEASTERN UNIV

High-speed data acquiring and digital signal processing board based on FPGA (Field Programmable Gate Array)

The invention discloses a high-speed data acquiring and digital signal processing board based on an FPGA (Field Programmable Gate Array), which is characterized by being integrally provided with an analog signal input and A/D (Analog-to-Digital) conversion module, a digital signal processing module and a communication module, wherein the analog signal input and A/D conversion module comprises a signal conditioning circuit and an A/D conversion module; the digital signal processing module comprises an FPGA module, a storage DDR2 and a data storage FLASH; the digital signal processing module is used for processing original sampling data through the steps of fault starting judgment, fault data shift out and wavelet transform processing; an embedded network is realized by the FPGA module; the communication module is connected with the FPGA module; and a networked physics layer chip is cooperated with an FPGA embedded network to realize the purposes of exchanging, collecting and calculating results with other plates or a background computer. According to the high-speed data acquiring and digital signal processing board, high-frequency transient state traveling wave can be synchronously collected and quickly processed.
Owner:ANHUI NANRUI JIYUAN POWER GRID TECH CO LTD +1

Superharmonic synchronous resonant accelerometer based on unidirectional electric synchronization

The invention discloses a superharmonic synchronous resonant accelerometer based on unidirectional electric synchronization. Two resonance sensing modules of a MEMS resonant accelerometer are symmetrically arranged on two sides of a mass block module and are respectively connected with the mass block module through a lever mechanism module, and the MEMS resonant accelerometer introduces a vibration signal into an external high-frequency oscillator in the form of an electric signal to form super-harmonic synchronization. Within the synchronization bandwidth, the high-frequency resonator multiply amplifies the frequency offset of the MEMS resonant accelerometer. According to the invention, the problem of scale factor reduction caused by the interaction between coupled oscillators is solved,and the advantage of the super-harmonic synchronization effect on the performance improvement of the whole machine is brought into full play. Meanwhile, when the two oscillators are synchronous, the noise of the sensitive beam oscillation circuit is greatly suppressed, and the frequency stability is greatly improved. The performance indexes of the resonant accelerometer are optimized from the aspects of improving sensitivity, improving resolution, reducing noise and the like.
Owner:XI AN JIAOTONG UNIV

Broadcast quality monitor

The invention discloses a broadcast quality monitor comprising a display screen. The broadcast quality monitor is characterized by comprising an equalizer, a demultiplexing module, an AES 3-to-I S module, a D/A converter module, a data sampling module, a data processing module, a dynamic audio frequency sliding column module and a display driver module, wherein the equalizer is used for equalizing and compensating the line loss of the SDI signals embedded in the digital audio signals; the demultiplexing module is used for demultiplexing and separating out a video signal and a first audio signal; the AES 3-to-I S module is used for converting the first audio signal into an I S audio signal; the D/A converter module is used for converting the I S audio signal into a simulated audio signal; the data sampling module is used for sampling the voltage of the simulated audio signal; the data processing module is used for converting a voltage value obtained by sampling into a dB value; according to the dB value, the dynamic audio frequency sliding column module is used for generating and transferring a dynamic audio frequency sliding column with corresponding length to the display driver module according to the dB value; the display driver module is used for overlapping the dynamic audio frequency sliding column on the video signal; therefore the dynamic audio frequency sliding column can be displayed on the display screen in real-time. The invention completely solves the problem of audio monitoring of SDI interfaces by one step.
Owner:广东响石数码科技有限公司

Viewpoint switching method and system for multi-viewpoint video

The invention discloses a viewpoint switching method of a multi-viewpoint video, which comprises the following steps: after a terminal receives a viewpoint switching request, checking whether an IDR frame exists in the local cache content of the terminal of the current viewpoint within a preset duration; if the IDR frame exists in the preset duration, adding the time point of the IDR frame into the viewpoint switching request, and reporting the viewpoint switching request to a server; if the IDR frame does not exist in the preset duration and the cache content is greater than the preset duration, adding a time point after the preset duration into the viewpoint switching request, and reporting the viewpoint switching request to a server; if the IDR frame does not exist in the preset duration and the cache content is less than the preset duration, adding the time point of the cache tail end into the viewpoint switching request, and reporting the viewpoint switching request to a server; and emptying the terminal local cache after the time point in the viewpoint switching request of the reporting server. According to the invention, alignment of timestamps of different viewpoints in multi-viewpoint video switching is realized, so that connection of front and rear viewpoints is synchronized in time. The invention further discloses a corresponding viewpoint switching system for the multi-viewpoint video.
Owner:FENGHUO COMM SCI & TECH CO LTD

Comprehensive processing and utilization method of candied date processing wastewater

The invention relates to a comprehensive processing and utilization method of candied date processing wastewater. According to the invention, candied date processing wastewater is subjected to a quality-differentiated processing method. High-sugar-content wastewater is subjected to multi-effect evaporation, such that sugar is recovered. Therefore, sewage processing load is greatly reduced, and considerable economic benefit can be produced with the recovered sugar. Date washing water, ground cleaning sewage, and other domestic sewage are gathered and processed, at the same time, coal-fired boiler flue gas desulfurization is performed. Bio-desulfurization is carried out with organic pollutants in the sewage as a nutrient source, sewage is also processed to a certain extent, and water temperature is increased, such that subsequent biochemical treatments are facilitated. Biochemical treatment outlet water is subjected to biochar deep processing, and is subjected to microfiltration and RO (reverse osmosis) double-membrane processing, such that outlet water salinity is reduced, and boiler softened water requirement is reached. Therefore, date processing wastewater discharge amount can be further reduced, and consumption and discharge of softening acid and alkali for traditional boiler water can be further reduced.
Owner:庞金钊

Zero-tension cloth loosening machine

The invention relates to a zero-tension cloth loosening machine. The zero-tension cloth loosening machine comprises a cloth loosening bracket, a cloth placing unit, a swinging unit and a cloth storing unit, wherein the cloth placing unit comprises a pair of horizontally and parallelly distributed cloth placing rollers, and cloth rolls are placed above the two cloth placing rollers; the swinging unit comprises a cloth discharging hopper, a cloth guiding roller is further arranged above the cloth discharging hopper, and the swinging unit further comprises an eccentric disc which drives the cloth discharging hopper to swing left and right in the horizontal direction, and the eccentric disc is connected with the cloth discharging hopper through a connecting rod and rotates synchronously with the cloth placing rollers through a linkage mechanism; and the cloth storing unit is mounted in the cloth loosening bracket and is located below the cloth discharging hopper, and the cloth storing unit comprises a cloth collecting tray. The zero-tension cloth loosening machine has the advantages that the swinging unit is additionally arranged on the cloth discharging sides of the cloth placing rollers, the cloth sent by the cloth discharging hopper can be automatically tidied and folded by utilizing left-right swinging of the cloth discharging hopper, secondary tidying and folding by manpower are not required, the manual labor is reduced, and the work efficiency is improved accordingly.
Owner:NANTONG TIMES CLOTHING

Special complex probiotics fermented Chinese herbal medicine health-care oral solution for minks and preparation method

The invention discloses a special complex probiotics fermented Chinese herbal medicine health-care oral solution for minks and a preparation method. The special complex probiotics fermented Chinese herbal medicine health-care oral solution for the minks is prepared from a Chinese herbal medicine extracting solution and a complex probiotics fermented solution at a volume ratio of 1 to (1 to 2); the invention also provides the preparation method of the special complex probiotics fermented Chinese herbal medicine health-care oral solution for the minks. Chinese herbal medicines and complex probiotics are matched so that the aim of synchronously treating and nourishing can be realized; the organism immunity of the animal minks is improved while virus diseases are treated; the special complex probiotics fermented Chinese herbal medicine health-care oral solution not only can have disease treatment and prevention effects, but can also promote a symbiotic fermentation effect of lactic acid bacteria and bacillus in the health-care solution; a lot of intermediate products, such as glucuronic acid, gluconic acid, acetic acid, lactic acid and amino acids, are generated; the oral solution can replace antibiotics and chemical disease-resisting medicines in a certain range, so that real green ecological breeding is realized.
Owner:QINGDAO AGRI UNIV
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