32 results about "GLONASS" patented technology

The invention belongs to the technical field of satellite navigation, and particularly relates to a Beidou terminal performance closed-loop test system and method, and the system comprises a multi-system GNSS navigation signal simulation source which is used for simulating a test signal and evaluating the core performance of a navigation terminal in real time; the Beidou RDSS and short message test system is used for simulating RDSS outbound signals and completing capturing, tracking, analysis and parameter measurement of RDSS inbound signals; the satellite navigation signal forwarding system is used for receiving satellite signals and completing work such as machine testing, system debugging, time service and positioning; the portable data acquisition and playback system is used for acquiring four signals, namely, a BDS signal, a GPS signal, a GLONASS signal and a Galileo signal; and the microwave anechoic chamber is used for providing a wireless shielding test environment, supporting the rotary table to spin and simulating the running state of the missile-borne receiver. According to the invention, the comprehensive testing of the basic function performance of various navigation products, such as passive positioning, active positioning, position report and short message, can be realized, and the method has a good market application prospect.

The invention relates to the technical field of security and protection equipment, and discloses a portable multi-mode intelligent alarm terminal based on Beidou positioning, which comprises a Beidou third-generation positioning module, a multi-mode communication module, a dual-mode power supply system, a physical key assembly, a central processing unit and a sensor array, the Beidou third-generation positioning module supports BDS / GPS / GLONASS multimode fusion positioning, the positioning precision is less than or equal to 1m (in an outdoor enhancement mode), and the multimode communication module integrates 4G / 5G data communication, Beidou short message transmission and Bluetooth LE near field communication functions. According to the invention, through Beidou third-generation / GPS / GLONASS multimode fusion positioning, the Kalman filtering algorithm and the signal-to-noise ratio dynamic weighting technology are combined, and the outdoor positioning precision of less than or equal to 1m is realized. When a satellite signal is shielded, an inertial navigation mode is automatically switched to, a trajectory is corrected by utilizing data of a triaxial accelerometer, and an accumulative error is controlled within 5m / min. Through actual measurement, the positioning success rate in the urban canyon environment reaches 98% and is improved by 40% compared with that of a traditional single-mode GPS terminal, and it is ensured that rescue force quickly and accurately arrives at the site.

The invention relates to the technical field of construction surveying and mapping, and provides a surveying and mapping instrument for building engineering construction, which comprises a laser scanning unit which comprises a polygon prism rotary scanning mechanism and a galvanometer system and is used for emitting laser beams with the wavelength range of 800-1600nm and generating three-dimensional point cloud data of a target area, and the adjustable range of the scanning frequency is 10-200Hz; the GPS positioning unit is integrated with a dual-frequency RTK differential module, supports Beidou / GPS / GLONASS multi-system positioning, obtains space coordinates (x, y, z) of a surveying instrument in real time, the positioning error is less than or equal to 2cm, and synchronizes differential data with a base station through a 5G network, the data delay is less than 50ms, and the environment sensor unit comprises a temperature and humidity sensor, an illumination sensor and a laser radar haze detection module. Under the haze condition, the image definition Q can be improved by 45%, the data stability can be improved by 60% when temperature and humidity fluctuate, the GB / T50328-2019 surveying and mapping precision AA-level standard is met, the automatic recognition rate of abnormal points is larger than or equal to 98%, the path planning time is shortened to be within 5 seconds, and the comprehensive surveying and mapping efficiency is improved by 35%.

1. Name of the Design Product: Geodetic GNSS Receiver (M50). 2. Use of the Design Product: This design product is used to receive and externally provide the position and observation information of satellites in global satellite navigation systems such as Beidou, GPS, Galileo, and GLONASS, and is a satellite navigation and positioning terminal device integrating satellite positioning, data storage, and communication transmission. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The invention discloses a GPS / GLONASS inter-frequency clock deviation modeling and forecasting method and device, and the method comprises the steps: obtaining positioning data received by a receiver from a satellite, and constructing a geometric-free ionosphere-free phase combination observation value according to the positioning data; an inter-epoch difference method is adopted to remove ambiguity constants absorbing phase hardware delay time invariants in the geometry-free ionosphere-free phase combinations, and a single observation station ionosphere-free combination IFCB is obtained; integrating observation data of multiple observation stations, and calculating a final IFCB deviation by adopting a multi-station weighted average mode; according to the IFCB data, carrying out harmonic analysis by adopting fast Fourier transform to obtain an accurate period of an IFCB sequence, and proposing an IFCB model based on a third-order polynomial and a seven-period harmonic function; and performing experiment forecasting according to the IFCB time sequence model, extracting and comparing periodic characteristics of IFCB deviation, and calculating an optimal forecasting period. According to the method, the observation data of the GPS / GLONASS system can be corrected in real time, so that the positioning result is accurately corrected to improve the positioning accuracy.

The utility model provides a reservoir and dam integrated safety research and judgment system, which relates to the technical field of dam safety research and judgment and is arranged on a dam body between a reservoir area and the downstream of the dam body. The safety studying and judging system comprises a plurality of safety monitoring devices, an osmotic pressure monitoring device used for measuring pore water pressure, a dam foundation seepage monitoring device used for monitoring dam foundation seepage and a Beidou displacement monitoring device used for monitoring dam body displacement, and the safety monitoring devices are arranged at the top end of a dam body. The safety monitoring device has rainfall monitoring and water level monitoring functions, the seepage pressure monitoring device is vertically buried in a dam body, the dam foundation seepage monitoring device is arranged at the junction of the downstream of the dam body and the dam body, and the Beidou displacement monitoring device is arranged at the top end of the dam body. The satellite data of the BD / GPS / GLONASS is acquired through a GNSS (Global Navigation Satellite System) antenna; the GNSS receiver is connected with the network antenna through a radio frequency cable, and the network antenna carries out the data receiving and transmitting of the whole Netcom frequency band.

The application relates to a miniaturized satellite navigation receiver, which receives three constellation navigation satellite signals of GPS, GLONASS and BD second-generation B1 through a first electric connector, receives a BD second-generation B3 constellation navigation satellite signal through a second electric connector, and respectively carries out filtering, frequency mixing and down conversion to a baseband, and through an A / D analog-digital converter, the down-converted analog-digital conversion is sent to an FPGA; the FPGA realizes capturing and tracking of the above three navigation signals, and after frequency domain narrowband interference resistance processing of another frequency point navigation signal, the FPGA realizes capturing and tracking again, the FPGA sends demodulated original data to a DSP, the DSP carries out navigation calculation, and a data stream is transmitted through an interface circuit, the receiver realizes reduction of the volume of the satellite navigation receiver, realizes miniaturized design, has strong anti-interference capability, the FPGA has large design resources, and the performance of the satellite navigation receiver is greatly improved.

The invention provides Beidou / GNSS (Global Navigation Satellite System) area enhancement and meteorological service integrated terminal equipment and a high-precision positioning method. Relates to the technical field of satellite navigation positioning and meteorological information service, and comprises a multi-constellation multi-frequency signal receiving module which is used for receiving Beidou No.3, GPS, GLONASS and Galileo satellite navigation signals and Beidou PPP-B2b satellite-based enhancement signals at the same time and outputting unified time stamps. According to the Beidou / GNSS area enhancement and meteorological service integrated terminal equipment and the high-precision positioning method, multiple satellite navigation systems are integrated, and Beidou PPP-B2b satellite-based enhancement signals are received at the same time, so that multi-source and multi-band high-precision observation data are formed. Through parallel access to a cellular network, satellite communication and a local area network, effective acquisition and processing of foundation NRTK differential flow, Internet PPP-RTK correction flow and real-time meteorological messages are realized. And in combination with a self-adaptive fusion positioning calculation module, RTK or PPP-RTK calculation is preferentially adopted when a foundation link is normal, so that continuous centimeter-level high-precision positioning in different communication environments is realized.

Disclosed in the present invention is a safety separation progressive decision tree-based unmanned aerial vehicle conflict prediction method, comprising: establishing an unmanned aerial vehicle safety separation parameter library; establishing a coordinate transformation model parameter library for transforming a WGS-84 coordinate system or a GLONASS-PZ90 coordinate system to a CGCS2000 coordinate system, and encapsulating a constructed Bursa-Wolf model into a coordinate transformation function; parsing flight dynamics data and performing standardized transformation; performing airspace-based unmanned aerial vehicle conflict prediction, and classifying prediction results by conflict risk level into a monitoring dataset, a close-monitoring dataset, and a warning-alert dataset; and calculating the time for an unmanned aerial vehicle pair in the close-monitoring dataset to potentially reach a warning-alert level, and calculating the estimated time to collision for a conflicting unmanned aerial vehicle pair in the warning-alert dataset. The present invention can maximize space resource utilization in an airspace, thereby effectively increasing the air traffic flow within the airspace.

The invention relates generally to the radio navigation field and may be applied to design of Global Navigation Satellite System (GNSS) Receivers, and particularly of GNSS GPS (USA), Galileo (EU), Glonass (Russia), Beidou (China), QZSS (Japan), IRNSS (India), and augmentation systems SBAS (different states). In the invention, the function of generating various PRN codes is repositioned from numerous tracking channels of multi-frequency, multi-constellation GNSS receiver to a shared PRN code generator unit, which serves in series all tracking channels. Such centralization of the PRN codes generation function enables a significant complexity reduction when the GNSS receiver includes a great number of tracking channels. A sufficient speed performance of the shared PRN code generator is achieved due to transfer of the PRN code lines from the shared PRN code generator to the receiver tracking channels via a dedicated parallel bus. Speed performance requirements to the dedicated parallel bus of the shared PRN code generator is kept moderate by a special number of symbols choice of PRN code lines thus providing uniformity of tracking channels requests to get new code lines. Use of several alternate means of PRN code lines forming: PRN Code ROM, PRN Code RAM, LFSR-based and one-shot PRN code generators—permits choosing optimal generation means for each type of GNSS signals.

A repeater for wireless communications systems can include a time-division-duplex (TDD) architecture with a timing recovery system for switching between uplink and downlink. In some approaches, the timing recovery system can receive a timing reference from a global navigation satellite system (GNSS) such as Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), or Galileo.

The invention relates to a GNSS baseband with a configurable scale. The GNSS baseband comprises an IF interface module, a preprocessing module, a tracking engine FIFO module, a tracking engine group and an arbitration module. According to the invention, a specific flexible baseband architecture is used for processing navigation signals of a GPS, a BDS, a GLONASS, a Galileo and the like. In satellite signal tracking, a time division multiplexing mode is adopted for a tracking channel, state / control data of a corresponding channel is loaded during multiplexing switching of the corresponding channel, and register state data of the corresponding channel is written back into an SRAM after channel operation is completed. And through a channel time division multiplexing mode, the chip area is effectively saved, and the utilization rate of hardware is improved. According to the invention, multi-system, multi-frequency-point and multi-channel tracking is realized, the scale of the GNSS baseband can be randomly configured between a single-system single frequency point and a multi-system multi-frequency point, the configuration mode is simple, and composition modules of the GNSS baseband system can be flexibly selected.

The embodiment of the present disclosure provides a GLONASS system pseudo-range observation calibration method, device, receiver and storage medium, the GLONASS system pseudo-range observation calibration method comprises: obtaining the frequency point and channel number of the original pseudo-range observation; determine the inter-frequency code bias corresponding to the frequency point and channel number of the original pseudo-range observation; according to the inter-frequency code bias determined, the original pseudo-range observation is calibrated, and the calibrated pseudo-range observation is output.The present disclosure can make the GLONASS inter-frequency code bias of all receivers in a reference station network consistent, and also make the GLONASS inter-frequency code bias of receivers of any brand consistent, thereby improving the positioning accuracy of network RTK or PPP service.

The utility model provides a satellite signal separation circuit, a chip and a receiver, relates to the technical field of satellite communication, and can separate satellite signals of each satellite navigation system from mixed satellite signals. The satellite signal separation circuit comprises a hybrid satellite digital signal input end, a first band-pass filter, a second band-pass filter, a third band-pass filter and a satellite signal processing circuit, and the first band-pass filter is used for separating GPS satellite digital signals in hybrid satellite digital signals. The second band-pass filter is used for separating Beidou satellite digital signals in the mixed satellite digital signals, and the third band-pass filter is used for separating GLONASS satellite digital signals in the mixed satellite digital signals; the hybrid satellite digital signal input end is electrically connected with the first band-pass filter, the second band-pass filter and the third band-pass filter respectively; the first band-pass filter, the second band-pass filter and the third band-pass filter are electrically connected with the satellite signal processing circuit.

The invention relates to the field of satellite radio navigation measurement and positioning, and discloses an unmanned aerial vehicle defense system and method based on multimode navigation decoy. Comprising a situation acquisition module, a strategy management module, a multi-constellation decoy parameter solving module, a decoy signal synthesis and emission module, a confinement control module, an effect evaluation module and a closed-loop scheduling module. Based on a target state sequence and a deception target parameter, solving a deception parameter set of the GPS, the Beidou and the GLONASS, applying cross-constellation time reference consistency, pseudo-range continuity and trajectory smoothness constraints, and transmitting a satellite radio navigation deception signal in a limited sector and a power upper limit, and according to the decoy effect evaluation quantity, triggering updating and executing continuity protection on the code phase, the carrier frequency and the carrier phase.

The utility model discloses a signal processing system of a Beidou base station receiver. The signal processing system comprises a main control board, a GNSS OEM board, a man-machine interface module, and a wireless transmission module, a radio frequency front end, a signal processing unit and a power supply management module which are arranged on the main control board. The radio frequency front end is connected with an external antenna, the output end of the radio frequency front end is connected with the signal processing unit, and the signal processing unit is further connected with the GNSS OEM board, the wireless transmission module and the human-computer interface module through interfaces. The system has the advantages that the accuracy of a positioning result is improved by reducing the noise characteristic of a received signal through the radio frequency front end, so that the positioning is more accurate; through cooperation of a radio frequency front end, an SNB1008 chip, an FPGA chip, a DSP chip and a processor, detection, identification, processing and comparison are respectively carried out on collected Beidou, GPS and GLONASS satellite signals. Hardware on the signal processing system can be controlled through software application, software and hardware combination is achieved, and various preset functions are achieved.

A repeater for wireless communications systems can include a time-division-duplex (TDD) architecture with a timing recovery system for switching between uplink and downlink. In some approaches, the timing recovery system can receive a timing reference from a global navigation satellite system (GNSS) such as Global Positioning System (GPS), Global Navigation Satellite System (GLONASS), or Galileo.

The invention relates to the technical field of GNSS (Global Navigation Satellite System) antennas, in particular to a multi-frequency and multi-mode metal sheet GNSS Patch antenna filled with a PPO (Poly-p-phenylene Oxide) material, which comprises a plurality of layers of GNSS Patch antennas, each layer of GNSS Patch antenna comprises a PPO substrate and a metal sheet Patch antenna, each layer of the metal sheet Patch antenna is attached to each layer of the PPO substrate, the two layers of the GNSS Patch antennas are mutually attached, and each layer of the metal sheet Patch antenna is provided with an antenna feeder. Through the layered design of two layers of PPO substrates and two layers of metal sheets, the lower layer realizes a GNSS low-frequency band (such as L5 / L2) function, and the upper layer realizes a GNSS high-frequency band (such as L1) function. According to the structure, the antenna can cover a plurality of frequency bands at the same time, and the multi-mode requirement of a global navigation satellite system (GPS / GLONASS / Galileo / Beidou) is met. Simulation data show that the 3D directional diagram can realize right-handed circular polarization (RHCP) radiation waves, the low-frequency gain reaches 5.0 dBi, the high-frequency gain reaches 5.6 dBi, and the performance is obviously superior to that of the traditional similar ceramic antenna.

The invention discloses a method and system for triggering alarm clock reminding based on a geographic position, and relates to the technical field of geographic information. According to the method and system for triggering alarm clock reminding based on the geographic position, the current position information of a user is obtained in real time through a terminal, the time for arriving at a destination is calculated in combination with a movement route and a movement speed, and when the detected time is within a preset reminding range, a reminding function is activated. The core of the method is that positioning data provided by a GPS, Beidou, Galileo, Glonass and the like are obtained, a motion path is calculated, time prediction is carried out, a multi-sequence priority system is set as a trunk by taking a previous driving route and driving time data as a benchmark, and time prediction is carried out. A double verification process, a priority level increasing system and a priority level adjusting system are formed in combination with a geofence, and a more accurate and diversified reminding function is given; the system supports cross-equipment linkage synchronous reminding, and is suitable for anti-sitting and station-crossing early warning in travel scenes such as public transportation, online car hailing, factory and enterprise regular buses and self-driving navigation.

The embodiment of the application discloses a method for processing pseudorange inter-frequency bias in a GLONASS system. The method is applied to a multi-GNSS system, and the method comprises the following steps: when an observation environment meets a preset condition, obtaining position information of a mobile station by using non-GLONASS system satellite observations; obtaining pseudorange single-difference values of each GLONASS satellite by using the position information of the mobile station and pseudorange observations of each GLONASS common-view satellite of the mobile station and a base station; calculating pseudorange double-difference values of each GLONASS satellite except for a selected GLONASS reference satellite, and further determining the pseudorange inter-frequency bias values of each satellite in the GLONASS system; obtaining stable pseudorange inter-frequency bias values of each GLONASS satellite by filtering; and when the observation environment is poor, compensating the pseudorange inter-frequency bias values of the GLONASS satellites and then participating in positioning, so as to improve the pseudorange differential positioning performance.

A method and apparatus for mitigating GNSS signal interference using an adaptive notch filter (ANF) operates based on signals received from one or more satellites of a global navigation satellite system (GNSS) such as GPS, GLONASS. The apparatus in one embodiment consists of a notch filter having a tunable transfer function zero frequency, receiving an input signal and generating an output signal. A bandpass filter connected to the output of the notch filter receives the output signal. An adaptation block is connected to the bandpass filter and adjusts the parameters of the notch filter to minimize a particular cost function.

A claim for protection is being asserted for: • A compact all-in-one outdoor station in an outdoor housing for mast or wall mounting, which detects GNSS interference (interference, jamming, or spoofing) via a receiving antenna on the L1 band, analyzes the GPS, Galileo, Beidou, and Glonass constellations, classifies detected interference as interference, jamming, or spoofing, calculates an interference level, and automatically generates a NOTAM message based on the type and level of interference, encodes this message as FIS-B, and transmits the encoded message via UAT978 through the transmitting antenna on the 978MHz frequency.

1. Name of this design product: Antenna (RTK Antenna). 2. Purpose of this design product: An antenna used to receive radio frequency signals from satellites (such as GPS, GLONASS, Galileo, BDS, etc.). 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The utility model relates to a GNSS positioning terminal, and belongs to the technical field of engineering measurement. The terminal comprises a mainboard, an STM32 core board, a screen module, a GNSS module and a rotary encoder. A core board interface, a USB female seat, a GNSS module interface and a rotary encoder interface are welded on the mainboard; the STM32 core board is electrically connected with the main board through the core board interface, the screen module is electrically connected with the STM32 core board, the GNSS module is electrically connected with the main board through the GNSS module interface, and the rotary encoder is electrically connected with the main board through the rotary encoder interface. The mainboard disclosed by the utility model adopts a function partition integrated design, so that the cost is low, and the later maintenance is easier. The GNSS module disclosed by the utility model supports Beidou, GPS and GLONASS multi-system joint calculation, signal lock loss is effectively avoided, and the plurality of button contacts are matched with the plurality of buttons, so that the positioning efficiency and the data entry speed under complex terrains are improved.

1. The name of the design product: multi-system satellite navigation receiver. 2. The use of the design product: multi-system satellite navigation receiver is a receiver that supports GPS, Glonass, Beidou and other multi-systems, and can accurately receive Beidou second and third generation satellite signals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: front view.

The utility model discloses a novel board card type navigation and positioning receiver which comprises a mounting base, a geomagnetic compass is fixedly arranged in the middle of the top end of the mounting base, and a GPS (global positioning system) positioning module and a BeiDou navigation module are fixedly mounted on one side of the top end of the mounting base. A GPS positioning module, a BeiDou navigation module, a GLONASS navigation positioning module and a Galileo navigation positioning module are arranged in the navigation positioning receiver, so that the product supports a plurality of satellite systems such as GPS, BeiDou, GLONASS and Galileo, a geomagnetic compass is additionally arranged in the navigation positioning receiver, and meanwhile, four high-precision antennas are arranged in the navigation positioning receiver, so that the positioning precision can be stably kept within one meter, and the navigation positioning receiver can be applied to the field of navigation positioning. Moreover, the system has an omnibearing high-precision positioning function, can meet the strict requirements of industrial-grade positioning and personal use requirements, and can achieve the precise operation of an unmanned aerial vehicle at high efficiency.

The invention discloses an intelligent bone conduction earphone with health monitoring and sitting posture correction functions. The intelligent bone conduction earphone comprises a data processor, and a bone conduction audio module, a health monitoring module and a data transmission module which are connected with the data processor, the bone conduction audio module comprises an earphone vibration unit for generating vibration, a six-axis sensor for monitoring the motion states of the head and the cervical vertebra, and a microphone; the health monitoring module comprises a PPG optical sensor for monitoring the heart rate and blood oxygen, an MEMS inertial unit for monitoring the gravity center acceleration and an air pressure sensor for monitoring the altitude. The data transmission module comprises a GPS positioning unit and a GLONASS positioning unit which are used for positioning, and an ANT + unit, a Bluetooth unit and a Wi-Fi unit which are used for being connected with external equipment. According to the invention, no neck cone monitoring function in a riding state or a sitting posture state is made up, and health management, environmental perception and immersive experience are combined.

The invention relates to a GLONASS signal capturing method, device and equipment and a medium. The method comprises the following steps: acquiring frequency division multiple access GLONASS signals of different satellites on different carriers; performing down-conversion and ADC sampling processing on the frequency division multiple access GLONASS signal in sequence to obtain intermediate frequency data with a sampling rate of 100MHz; the method comprises the following steps: dividing 100MHz intermediate frequency data into two paths of 100MHz signals I and Q, and performing speed reduction processing on the two paths of 100MHz signals I and Q by adopting a preset 9.198 MHz capture sampling rate to obtain two paths of signals I and Q with the sampling rate of 9.198 MHz; and I and Q signals of 9.198 MHz are cached to AEFIFO so as to capture any satellite to be captured. Through the method provided by the invention, satellite signals of all frequency points can be cached at one time for signal capture, so that the capture efficiency is greatly improved.

The invention discloses a GLONASS citizen code navigation signal generation type deception jamming method. The method comprises the following steps: acquiring a real signal ephemeris, acquiring a deception transmitting point position, and setting a deception target position and deception jamming signal parameters; generating a visible satellite navigation signal of a deception target position, and filling a spread spectrum signal consistent with a real signal in a corresponding frequency position of an invisible satellite or a civilian code navigation FDMA signal of which an ephemeris is not obtained; setting the power of the frequency point for generating the deception jamming signal to be a first preset threshold value greater than the power of the real satellite navigation signal, and setting the signal power of the filling frequency point to be a second preset threshold value greater than the power of the real signal; the generated deception jamming signal is transmitted at a set power, the target is set to deviate from the real position of the target to a preset position at a preset acceleration, and the generated deception jamming on the target is realized; the method has the characteristics of low efficiency power and high efficiency probability, and can improve the effectiveness of the generative deception jamming.

An intelligent police service system combined with a Beidou digital twinborn platform is configured to receive satellite signals from a GPS, a GLONASS and a Beidou satellite navigation system, perform high-gain low-noise amplification processing and filtering on the satellite signals to obtain radio frequency input signals, and is configured to be in communication connection with a three-mode receiving module to obtain the radio frequency input signals. And the radio frequency front-end receiving module is used for receiving the radio frequency input signal, converting the radio frequency input signal into an intermediate frequency signal, and being configured to be in communication connection with the radio frequency front-end receiving module to obtain the intermediate frequency signal, and performing differential receiving processing on the intermediate frequency signal to convert the intermediate frequency signal into a corresponding digital signal. By combining the Beidou digital twin platform, the system not only provides high-precision positioning service, but also has strong command and dispatch capability, and realizes cross-region and cross-department flexible command and dispatch through equipment such as the public network cluster command and dispatch server, the cluster talkback, the public network talkback intelligent terminal and the like.