15results about How to "Strong anti-interference" patented technology

The application discloses a kind of leakage point positioning method, equipment and medium of water supply network, belong to water supply network operation and leakage control technical field, for solving in existing leakage point positioning, it is easy to rely on single data, equipment and algorithm complex, and also lack high-precision space linkage and to data adaptability and insufficient refinement, it is difficult to realize the technical problems of accurate positioning of water leakage point of water supply network.Method includes: the operating state of water supply network is processed to multi-source data acquisition, obtains water supply network core data;The standardization processing of feature vector is carried out to the corrected water supply network core data after pre-processing, obtains effective water supply network data;Effective water supply network data is screened under the risk value of leakage point area about leakage point, obtains high suspected leakage point area based on water supply network section;Leakage point spatial positioning calculation is carried out to high suspected leakage point area under local topology, obtains the final leakage point area position in water supply network grid.

This utility model discloses a fire suppression device for a nickel-metal hydride (NiMH) battery box under a train, including a box for housing the NiMH battery and a multi-parameter detector and a fire extinguishing device disposed within the box. The wiring terminals of the NiMH battery are located on the top of the NiMH battery body. The multi-parameter detector includes a housing and a smoke detector, a temperature detector, an H2 detector, and a CO detector located within the housing. The housing is fixed to the inner wall of the top plate of the box and is positioned facing the wiring terminals of the NiMH battery. The nozzle of the fire extinguishing device is positioned facing the NiMH battery. This utility model also provides a fire suppression system for a NiMH battery box under a train, including the aforementioned fire suppression device for a NiMH battery box under a train. By adopting the above technical solution and using a multi-parameter detector, the accuracy and response speed of early fire identification are significantly improved.

This invention discloses a differential information forwarding method, comprising the following steps: S1, setting parameters; S2, receiving differential information to be forwarded from a host computer; S3, encoding and transmitting the received differential information according to the set parameters; in step S1, the parameters include channel, transmit power, and modulation mode, wherein the modulation mode includes LoRa mode and GFSK mode; when the modulation mode is LoRa mode, two frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point, with the two frequency points alternately transmitting data frames; when the modulation mode is GFSK mode, three frequency points are set on each channel, with an interval of at least 55MHz between each frequency point, and a differential information signal is transmitted once at each frequency point; this invention employs a dual-frequency or triple-frequency retransmission mechanism, enabling the receiver to avoid interference points as much as possible in the time and frequency domains, greatly improving the data packet transmission success rate and adapting to complex electromagnetic environments.

The application discloses a point pair registration method and system based on feature guidance and double constraints, and belongs to the technical field of computer vision and robot grabbing. The method aims to solve the problems of recognition failure and insufficient estimation accuracy of traditional methods when parts are blocked and stacked, and point cloud features are not obvious. The scheme adopts a two-stage optimization strategy. Firstly, in the coarse registration stage, an adaptive sampling PPF algorithm guided by geometric features is proposed. By preferentially sampling points in the edge, curvature and other feature obvious areas, the robustness and efficiency of matching are improved. Secondly, in the fine registration stage, an ICP algorithm with multi-constraint optimization is proposed. The pose result obtained by coarse registration is used as the initial value. Through rotation and angle constraint, a multi-objective optimization function is constructed to guide the fine registration process to converge in the correct direction and avoid falling into local optimum, thereby ensuring the accuracy and physical feasibility of the final pose estimation. The application significantly improves the accuracy of industrial part pose recognition.

The invention provides a multi-channel CANFD (Controller Area Network Forwarding Detection) communication system and method based on ZYNQ, the communication system comprises an all-programmable system on chip ZYNQ, a DDR (Double Data Rate) memory, an optical transceiver module and a CANFD transceiver module, the all-programmable system on chip ZYNQ comprises a processing system PS and a programmable logic PL, and the PS and the PL are communicated through a GP port and an HP port. And the DDR memory is connected with the ZYNQ and is used for providing an application software running memory and storing CANFD receiving data and SRIO receiving and transmitting data. The PL comprises an SRIO control module, an SRIO IP, an AXI interconnection module and a multi-path CANFD IP module, and the PS and the SRIO control module of the PL are interconnected through a GP0 and an HP0. By means of the method, multi-channel CANFD conversion optical communication is achieved, and the problems that a traditional CANFD bus is not high in transmission rate and limited in transmission distance are solved.

The invention discloses a satellite mobile communication system multi-broadcast frequency point parallel search method and device, and the method comprises the steps: obtaining a satellite digital intermediate frequency signal containing a plurality of target frequency bands, carrying out the digital down-conversion processing of the intermediate frequency signal through employing multiple channels, obtaining a baseband signal corresponding to each target frequency band, and transmitting the baseband signal to a receiver; performing cross-correlation operation on the baseband signal after downsampling and filtering processing and a local broadcast signal; and performing frequency domain transformation on a cross-correlation operation result, determining the maximum amplitude and the signal-to-noise ratio in the frequency domain data of each channel, screening the effectiveness of each channel according to the signal-to-noise ratio, and determining the position of the satellite by taking the beam direction corresponding to the maximum amplitude in the effective channel as the incoming wave direction of the broadcast signal. The real-time performance of signal searching in the multi-frequency-point environment is improved, the high signal detection capacity and anti-interference performance are shown in the complex electromagnetic environment, and the method has the advantages of being small in resource consumption, high in operation speed, stable in searching result and good in universality.

The invention discloses an oral cavity three-dimensional scanning system and method based on dual-band heterogeneous structure light coding, and belongs to the technical field of optical three-dimensional scanning. The system comprises a light source, a coding light modulation device, at least two image acquisition units and a data processing unit, the light source can respectively emit first wave band light and second wave band light with different wave bands; the coding light modulator modulates the first wave band light into a main coding pattern containing discontinuous stripes and modulates the second wave band light into an auxiliary coding pattern containing continuous stripes, and the stripes of the two coding patterns are alternately arranged at intervals; the modulated first wavelength light and the modulated second wavelength light irradiate the surface of a measured area, and each image acquisition unit acquires a coded image reflected by the measured area; and the data processing unit decodes the main coding image to obtain a reference matching point pair and parallax data, decodes the auxiliary coding image based on the result to obtain a high-density extended matching point pair and extended parallax data, and completes integrated three-dimensional reconstruction through triangulation after integrating the two types of data.

The invention discloses a real-time communication mechanism for an agricultural irrigation network, and relates to the technical field of real-time communication.The real-time communication mechanism comprises AINP message format confirmation, AINP data exchange confirmation and AIDE cloud data exchange.The method includes the steps that firstly, the unified format of data frames is defined through the AINP message format confirmation step; irrigation valve state and opening signals are collected and converted into corresponding data frames, node response is completed based on a master-slave response mechanism, validity of a frame format is verified through DCR verification, LORA wireless communication specifications of irrigation valve nodes and an AINP gateway are confirmed and set through AINP data exchange, and the verified data frames are transmitted to the gateway based on an AINP data exchange algorithm. Finally, AIDE cloud data exchange is carried out, monitoring data are read and written through a cloud algorithm and uploaded to the cloud, and the system has the advantages of being low in cost, high in interference resistance, good in compatibility and reliable in data and is adaptive to a large-scale intelligent irrigation network.

This invention relates to the field of fiber optic sensing technology, specifically to an NHCPCF fiber optic seawater salinity sensor with dual microchannels, its fabrication method, and its application. The sensor comprises: an introductory single-mode fiber, a nodeless hollow-core photonic crystal fiber, and an outtroductory single-mode fiber, sequentially fused together. The nodeless hollow-core photonic crystal fiber includes a first cladding and a main vent. Uniformly distributed silica tubes are disposed inside the main vent, with the tube wall tangent to the inner wall of the main vent and the axis of the main vent parallel to the axis of the silica tubes. The sensor utilizes the anti-resonance reflection waveguide principle of NHCPCF and specific microchannels to measure seawater salinity. It avoids the traditional method of large-area cavitation in the cladding, employing microchannels to improve integration, effectively prevent fiber breakage, and enhance mechanical strength during testing. This sensor exhibits high sensitivity (salinity sensitivity -0.88 nm / ‰), good repeatability, and stability.

The utility model relates to positioning technology equipment field, concretely relates to a kind of positioning card based on the fusion of Beidou technology and UWB technology, including shell and built-in positioning communication circuit;Shell is assembled by upper shell and lower shell through clamping or insertion, and upper shell is equipped with touch screen, voice port and indicator light, and lower shell is equipped with communication interface;Positioning communication circuit contains dual-core main processing module, connects UWB positioning module, Beidou positioning module, dual power supply and power management module etc. Dual power supply independent power supply, and promote endurance;Dual positioning module cooperates to realize seamless positioning indoors and outdoors, and indicator light, voice and touch screen enhance interaction. The utility model is high in positioning accuracy, strong in anti-interference, and is applicable to complex environment positioning management.

The utility model discloses a device for measuring transparency in water, and belongs to the technical field of measurement of transparency in water. The device comprises a saybolt disc, a box staff and a lifting ring screw, the saybolt disc is a circular plate body, and the disc surface of the saybolt disc is arranged in a black and white alternate manner and is equally divided into four parts; a vertical box staff is arranged in the center of the top of the saybolt disc, the box staff is in a tower-type shrinkage form, a rough measurement surface with scales and a precise measurement surface with scales are respectively arranged on two surfaces of the box staff, and a threaded hole is formed in the bottom end of the box staff; a lifting ring screw is arranged in the center of the bottom of the saybolt disc and comprises a screw rod and a lifting ring, and the screw rod and the lifting ring are of an integrated structure; a screw rod of the lifting ring screw penetrates through the center hole of the saybolt disc in a matched mode and is in threaded connection with the threaded hole in the bottom end of the telemeter rod. The device is strong in interference resistance, avoids measurement interference of the rope caused by factors such as water flow ship shaking, can not be influenced by the factors such as water flow ship shaking during measurement, is accurate in vertical measurement, is high in measurement precision, and is simple, convenient and flexible to operate.

The utility model discloses a kind of controller automatic heat sink based on IGBT internal NTC, it is related to electronic equipment heat dissipation technical field.The device includes IGBT module, temperature acquisition module, control unit, heat dissipation execution mechanism and protection module;IGBT module built-in NTC thermistor, temperature acquisition module is connected with NTC to collect temperature signal, control unit receives temperature signal and exports control instruction to heat dissipation execution mechanism, protection module triggers protection mechanism according to temperature threshold value.The utility model monitors IGBT substrate temperature in real time by NTC, combines thermal model to compensate junction temperature deviation, realizes the automatic regulation and accurate protection of heat dissipation, improves the stability and life of IGBT work.

The application discloses a coumarin-quinoline hybrid near-infrared fluorescent probe compound for reversibly detecting sulfur dioxide and hydrogen peroxide, a synthesis method and application thereof. The probe takes a coumarin derivative as a fluorescent group and is connected with a quinoline salt through a conjugated chain. The probe itself has weak fluorescence, and after a specific Michael addition reaction occurs between the C-4 position of the quinoline salt unit of the probe and HSO3-, strong near-infrared fluorescence emission is generated at 712 nm, the response time is less than 5 seconds, and the detection limit is as low as 15.5 nM. The addition product can be oxidized by H2O2, the original probe structure is restored, and the fluorescence is quenched, so that reversible detection is realized. The probe has high selectivity and strong anti-interference ability. The probe can be used for quantitatively detecting the content of sulfur dioxide in food and water samples, and is successfully applied to imaging of endogenous and exogenous sulfur dioxide in living cells, monitoring of sulfur dioxide in lipid droplets and reversible cycle imaging of sulfur dioxide and hydrogen peroxide, and has important application value in the fields of food safety monitoring and biomedical research.

The invention relates to a method for dissolving out chloride ions and sulfate ions in sodium diuranate. A method for dissolving out chloride ions and sulfate ions in sodium diuranate comprises the following steps: mixing sodium diuranate and a dilute acid solution, and carrying out microwave extraction to obtain a first extracting solution; and filtering the first extracting solution, and carrying out cation separation treatment to obtain a second extracting solution. According to the method, a microwave extraction sample dissolving method is adopted, and the diffusion of chloride ions and sulfate ions in sodium diuranate into water is accelerated by utilizing electromagnetic waves, so that the chloride ions and the sulfate ions in sodium diuranate are effectively separated, the uniformity of an analysis sample is guaranteed, and the precision and the accuracy of a detection result are improved. According to the method, dilute acid is adopted as an extraction agent, use of chemical reagents and generation of uranium-containing waste liquid are reduced, the influence of chlorine-containing reagents on the detection result is avoided, and the method is safe, environmentally friendly, free of generation of toxic and harmful gas and environmentally friendly.