834 results about "Transponder" patented technology

According to the novel transponder and the Beidou short message-combined realization function and application method and system, multiple functions are realized by utilizing multiple combinations of ground and vehicle-mounted transponder system equipment, the novel transponder can be applied to multiple scenes, the equipment types can be simplified, the construction cost can be reduced, and the maintenance workload can be reduced; beidou positioning and short message functions, positioning and communication of wireless communication and the like are used as supplements to perfect train operation control and other functions, and the transportation efficiency and safety are improved.

The invention discloses a railway LEU-transponder transmission system lightning stroke fault risk assessment method, and the method comprises the steps: determining a lightning current invasion path through building a lightning stroke transient electromagnetic disturbance calculation model of an electromagnetic sensitive equipment port, and calculating the voltage and current at the port when incoming waves invade. And building an electromagnetic sensitivity test experiment platform of the railway signal system based on the lightning current invasion path and the voltage and current at the port. And performing label category prediction on the to-be-predicted sample point through each support vector machine model in the target model set, and voting each prediction result. According to the invention, a complex transmission relation between lightning transient electromagnetic disturbance and equipment failure risk is established through deep learning. The fault risk of the signal system under the lightning transient electromagnetic disturbance action is predicted through transient electromagnetic effect experimental data of real equipment of the railway signal system, and powerful support is provided for improving the electromagnetic sensitivity of the signal system and guaranteeing stable operation of a railway.

Disclosed in the present invention are a backup system, and a train control system and an application method thereof. The backup system comprises: a lineside electronic unit, which communicates with a TIS or a station computer-based interlocking device to obtain a signal state and turnout position information; and an active balise connected to the lineside electronic unit and an onboard device, respectively; wherein the lineside electronic unit determines sent movement authority information and line data information on the basis of the obtained signal state and turnout position information; when a train passes through the position where the active balise is located, the active balise sends the obtained movement authority information and line data information to the onboard device; and when entering an enhanced backup mode, the onboard device in the train control system calculates a speed-distance control curve on the basis of the movement authority information and the line data information obtained from the active balise, so as to perform train operation supervision and protection. According to the prevent invention, when train-ground wireless communication is interrupted and a train control system is degraded to a backup mode, a train is allowed to enter a station at a higher speed.

The embodiment of the invention provides an unmanned aerial vehicle positioning method and device, computing equipment, a storage medium and a program product, and the method comprises the steps: carrying out the positioning based on the collected current motion state information and / or environment information, and determining the current reference position of an unmanned aerial vehicle; under the condition that the transponder receiving device receives a signal of a target transponder, the time point of passing through the target transponder and the target position of the target transponder are determined, and the target transponder is any one of trackside transponders laid along a track in the track traffic system; and correcting the current reference position based on the time point of passing through the target transponder and the target position of the target transponder to obtain the target position information of the unmanned aerial vehicle. By combining the motion state of the unmanned aerial vehicle, the environment information and the accurate position of the trackside transponder, the position information of the unmanned aerial vehicle is corrected in real time, the positioning precision and reliability are improved, and the method is particularly suitable for the rail transit tunnel environment where positioning signals are unavailable.

An ostomy appliance includes a substrate and at least one Radio Frequency Identification (RFID) circuit disposed on the substrate. The RFID circuit includes a RFID transponder having an antenna and a conductive ink connected in series with the antenna and the RFID transponder. The conductive ink is configured to dissolve in response to exposure to moisture. The RFID circuit is in a closed condition when the conductive ink extends continuously between the RFID transponder and the antenna. The RFID circuit is in an open condition when at least a portion of the conductive ink is dissolved.

A respiratory therapy apparatus is operable to deliver multiple types of therapy to a patient. The apparatus includes a main housing and a nebulizer tray that selectively attaches to a bottom of the main housing. The apparatus also includes a filter housing unit having an antenna surrounding a pneumatic passage and a transponder chip coupled to the antenna. The main housing has also has an antenna that surrounds a respective pneumatic passage of a main outlet port of the apparatus. The main housing includes a reader that controls communication between the antennae. The main housing of the apparatus also has a pivotable hose support plate, a firmware upgrade port underneath part of the top wall of the housing, and a graphical user interface (GUI) that displays various user inputs for control of the apparatus and that displays various alert conditions that are detected.

An RFID-enabled metal face transaction card may comprise a thin front face metal layer (ML 1) with a “P1” module opening (MO) and a micro-slit (SI), and a thick metal layer (ML2) with “P2” module opening and a narrow slit. The metal layer (ML 1) may be color printed or coated, and have its surface protected by a laser-reactive diamond coat. The two metal layers may be separated by a PEN dielectric with a thermosetting epoxy on both sides which has been cured to an irreversible state (C-stage). The “P2” module opening in the metal layer (ML2) may have a shape and geometry which matches the shape and geometry of the module antenna (MA) of a transponder chip module (TCM). The shape of the “P1” and “P2” openings may be polygonal in form. The “P1” module opening in the metal layer (ML1) may have an alignment feature (GP) for ensuring correct alignment of the transponder chip module, when it is inserted into the openings.

The invention relates to the technical field of railway communication, and provides a train message information transmission method and system, and the method comprises the steps: constructing an electronic map, and storing the ID, type and position information of each transponder on a railway; when the train is powered on for the first time, the initial position of the train is obtained, transponder IDs on the two sides of the train are determined in the electronic map according to the initial position, the ID of the next transponder is selected according to the running direction of the train, and the type of the transponder is obtained; when the train runs, the ID of the passing transponder is recorded in real time, and the type of the next transponder is predicted according to the ID of the recently passing transponder; and adjusting a receiving mode of a train transponder receiving module according to the predicted transponder type, and adaptively receiving message information sent by the next transponder. According to the invention, the train control system does not need to add sidelobe management and transponder suppression functions, and can meet the communication requirements of two transponders.

An RFID transponder including a Bluetooth® compatible transceiver (BLEET) is described. The Bluetooth® compatible transceiver may be configured to set data that is transmitted via one or more RFID transceivers in the transponder and to return data received by the RFID transceiver(s) to a client application running, for example, on a user's smart phone. The BLEET may be used for electronic vehicle tracking or tolling. Vehicle occupancy data may be set by the user with the client application via a Bluetooth® connection in connection with high occupancy vehicle tolling and express lane incentive programs. The BLEET may be used in a congestion pricing (CP) toll area, wherein the smart phone determines a toll rate based on the location, when triggered by the BLEET, that the BLEET was read by an RFID reader located on a boundary of the CP toll area.

The invention discloses an underway real-time GNSS acoustic underwater positioning method, which belongs to the technical field of underwater positioning, is used for acoustic underwater positioning, and comprises the following steps: constructing an extended Kalman filtering solution model, constructing a constraint equation by taking coordinate prior information of a seabed transponder as a constraint, and solving an initial state parameter and an initial covariance matrix; and processing ill-conditioned problems in the initial state parameter and initial covariance matrix solving process by adopting a Tikhonov regularization method, substituting the initial state parameter and an initial covariance matrix value into an extended Kalman filtering solution model, and carrying out real-time GNSS acoustic underwater positioning on the submarine transponder. The real-time positioning method for the GNSS-acoustic seabed transponder solves the possible ill-conditioned problem in the solving process, has good performance of short convergence time and high precision, can improve the real-time positioning efficiency of the GNSS-acoustic seabed transponder, and is expected to provide powerful technical support for seabed plate movement, geological disasters, disaster early warning and seabed geodetic datum updating.

Methods and systems for fiber identification include emitting a pump pulse on a fiber using a transponder. A Brillouin gain spectrum of reflected radiation from the pump pulse is measured using the transponder. A fiber type is determined corresponding to the Brillouin gain spectrum.

The invention provides a GEO communication satellite uplink signal Doppler frequency compensation method and device. The method comprises the following steps: acquiring a satellite orbit determination result corresponding to a GEO communication satellite; determining a Doppler compensation frequency curve according to the satellite orbit measurement result and the local frequency of the frequency conversion of a satellite transponder configured in the GEO communication satellite; and compensating a first uplink signal to be transmitted from the ground station to the GEO communication satellite by using the Doppler compensation frequency curve through the compensation frequency mixer, and transmitting the compensated first uplink signal to the GEO communication satellite. According to the invention, under the condition that the user receiver is non-inductive, the carrier frequency and the spreading code rate of the user receiver are changed in equal proportion, so that the user receiver can adopt a receiving algorithm of the carrier-assisted spreading code rate to improve the sensitivity.

The invention relates to the technical field of rail traffic, in particular to a virtual coupling station track departure scene marshalling method, device and equipment and a medium. After each train in the virtual coupling group train crosses the transponder group, periodically sending a message packet 1 containing train distance information to the ground equipment; after the front train of the virtual coupling group train leaves the station, the front train receives a message packet 2 which is sent by the ground equipment and contains the converted distance information; wherein the converted distance information and the train distance information of the next train are based on the same reference object; and the front vehicle sends the converted distance information to the rear vehicle, and throat area grouping is completed. Through a train-ground-train communication mode, the ground equipment converts the position of the rear train into the position which can be identified by the front train and forwards the position to the front train, so that marshalling of the two trains is accelerated. Marshalling can be carried out in advance in the throat area, after marshalling succeeds, the rear vehicle can be controlled according to the driving permission of the following vehicle, and the running speed and the running efficiency are improved.

A radio frequency (RF) voltage limiter for a radio frequency identification (RFID) transponder is provided. The RF voltage limiter includes an envelope detector configured to track an envelope of a signal received at the antenna. The envelope detector has an output for providing an envelope signal. A peak detector is included and has an input coupled to the output of the envelope detector. The peak detector includes a current mirror having an input coupled to the output of the envelope detector, and an output configured to provide a control signal. A shunt circuit is coupled to provide an impedance to the antenna in response to the control signal. The impedance decreases with an increasing voltage of the control signal to limit a maximum voltage at the antenna. In another embodiment, a method is provided for limiting a RF voltage at the antenna.

The present invention provides a digital full-bandwidth direct-forwarding radar transponder system and its working method, which proposes a brand-new radar transponder system architecture and a corresponding new Morse code recognition scheme. The system of the present invention adopts a direct-forwarding system architecture, which combines digital broadband DRFM real-time forwarding technology and a line-replacing-by-point coding response architecture. The transmitting and receiving antennas are independent and work simultaneously, directly and indiscriminately encoding and forwarding all radar interrogation signals within the working frequency band, achieving Morse coding of the response information while retaining the complete waveform information. The system of the present invention can be equivalent to a target with special target characteristics. When the radar signals within the working frequency band irradiate this target, echo signals with specified Morse code modulation characteristics will be generated.

The present invention relates to a detection assembly (102) for detecting passing sports timing transponders (14) in a sports event, comprising: an antenna (106) and a calculation unit (104) connected to the antenna; and a channel element (22) for positioning the antenna and the calculation unit on an underlying surface and for protecting the antenna and the calculation unit from external forces, wherein said channel element is connectable to a preceding channel element (108) and a following channel element (110) to form a line; said calculation unit is connectable to a first neighboring calculation unit (112) via a first cable (114) extending into the preceding channel element and to a second neighboring calculation unit (116) via a second cable (118) extending into the following channel element; and said calculation unit includes a voltage detection circuitry (124) for detecting whether power is provided to the calculation unit via the first cable or via the second cable. The present invention further relates to a floor cable channel (20) and a race timing system (16).

The invention discloses a train multi-source information fusion positioning method based on 5G positioning, which fuses multi-source data information such as 5G positioning information, satellite positioning information, speed sensor information, transponder information and the like, and provides more reliable train position and speed information through redundancy complementation of the multi-source data information. The defect that positioning depends on satellite positioning and is greatly influenced by terrains and environments is overcome, and the problems that in the prior art, in the environments where satellite signals are shielded in tunnels, valleys and the like, satellite positioning fails, a system only uses a wheel axle speed sensor for speed measurement and distance measurement, and errors are large are solved.

The present invention is applicable to the technical field of rail transit. Provided are a movement authority calculation method and apparatus, and an electronic device, which can improve the reliability and efficiency of train operation. The method comprises: before a train leaves a station, an on-board ATP receiving and storing, in advance, all pieces of line data of a section that the train is about to travel, and when the train travels to the section and passes a first balise, updating active line data on the basis of the stored line data corresponding to the first balise, so as to calculate the movement authority of the train, without the need for updating the active line data after receiving line data sent by the first balise. Further provided in the present invention are another movement authority calculation method and blocked section determination method.

The invention relates to the technical field of rail transit, and provides a train protection method and device, electronic equipment, a storage medium and a computer product.The method comprises the steps that after a train-mounted transponder transmission module based on a train activation end obtains transponder data, if it is determined that the train-mounted transponder transmission module of the activation end is not abnormal, the train is protected; acquiring motion state information of the activation end; the activation end is one of the head and tail ends of the train; if it is determined that the motion state information of the activation end is abnormal, obtaining motion state information collected by an opposite end of the activation end; and if the motion state information acquired by the opposite end is not abnormal, determining train envelope information of the train based on the motion state information acquired by the opposite end and transponder data acquired by the vehicle-mounted transponder transmission module based on the activation end. According to the method and the device, the train envelope information can be determined to perform train protection only by transmitting the collected original data between the two ends of the train, so that the interaction redundancy phenomenon is effectively reduced, and the system complexity is reduced.

The invention provides a method for testing a phased array compact range of a high-orbit communication satellite. The method comprises the following steps: unfolding and fixing a whole satellite antenna on the ground; confirming that a test coupler is installed and a cable is connected normally; uploading software to a phased array antenna and confirming that the function is normal; setting a phased array transponder path, switching on the change-over switch, and opening the active single machine and the phased array on the path; after the phased array is preheated through telemetering, system-level testing is carried out, wherein at least one performance parameter such as noise spectrum and equivalent omnidirectional radiation power and functions such as program control pointing and beam hopping are tested; program control pointing function verification is performed according to wave beam program control preset pointing, and the DUT turntable is matched to verify the precision; hopping beam function verification jumps according to a preset time slot, and a Zero Span mode of a frequency spectrograph analyzes a time domain characteristic verification time sequence; and switching the phased array to standby after verification, shutting down after telemetering is normal, and recovering the on-satellite state. In this way, it can be ensured that the integration performance of the phased-array antenna and the transponder system meets the design requirement through quantitative analysis.

A Beidou short message communication method and a system for a low-power user terminal are provided. The method includes following steps: by a user terminal, receiving outbound signals broadcast by a central station and forwarded by a satellite transponder, and constructing a short message access frame with a fixed length for transmission; by the central station, receiving and parsing the short message access frame, so as to realize the allocation of time-frequency resource blocks and transmit the time-frequency resource blocks to the user terminal; by the user terminal, transmitting a short message communication frame with a fixed format to the central station; by a communication receiving device of the central station, receiving and sequentially carrying out sampling preprocessing, anti-interference processing, rapid capture and tracking demodulation on the short message communication frame to obtain communication service information, and pushing receipt information to the user terminal to complete an information push.

The invention discloses a train accurate positioning system based on multi-data interaction, which relates to the technical field of rail transit control and comprises a vehicle-mounted positioning terminal, a trackside cooperative positioning network and a cloud positioning decision platform. According to the invention, the multi-mode satellite receiving module, the inertial measurement unit, the millimeter wave radar and the laser radar module of the vehicle-mounted positioning terminal are used, and the intelligent transponder cluster, the optical fiber positioning sensor and the edge computing node of the trackside cooperative positioning grid are combined, so that real-time acquisition and interaction of multi-source heterogeneous data are realized; a data fusion engine of the cloud positioning decision-making platform is based on a Kalman filtering algorithm, combines a dynamic credibility evaluation model to dynamically distribute weights for data such as satellite signals, ultra wide band distance measurement, optical fiber mileage and radar feature matching according to scenes, and can output sub-meter positioning precision in different environments such as open areas, tunnels and curves. The problem of failure or error accumulation during signal shielding of a single technology is solved, and the deployment cost is remarkably reduced compared with that of a traditional scheme.

The invention discloses an NDN congestion control method suitable for variable network topology, and relates to the technical field of network communication transmission. The invention aims to solve the problems of low throughput and high time delay in the scene of frequent change of network conditions due to the fact that bandwidth resources cannot be fully utilized in the conventional congestion control method. The method comprises the following steps: a consumer sends an interest packet to a transponder according to a set rate in a set congestion window; the transponder forwards the interest packet to the producer after receiving the interest packet, and the producer generates a data packet and sends the data packet to the transponder; each forwarder forwards the data packets according to the sequence that the data packets reach the forwarder, updates the congestion values in the data packets at the same time, and then sends the data packets containing the queue congestion degree values to the consumer; and the consumer adjusts the size of the congestion window or the sending rate of the interest packet according to the congestion degree value in the data packet. The method is used for NDN congestion control.

The invention provides a method and a system for identifying and processing abnormal startup and shutdown of measurement and control equipment of a satellite service system. The method comprises the following steps of: S1, de-noising telemetry information received by a preprocessed measurement and control responder by using a filtering model; s2, dynamically adjusting the weight ratio of the signal strength, the error rate and the response time to evaluate the on-orbit performance of the measurement and control responder; and S3, if the measurement and control responder is in a normal working state and receives a host or standby shutdown instruction of the responder, firstly judging the state of the whole satellite, then judging the code block telemetering information, and if no problem exists, judging the instruction as an abnormal behavior, and shielding the instruction by the security software. According to the method, the new measurement value can be responded in real time through continuously updating the state estimation by adopting the Erman filtering, and the adaptability of the system to the dynamic change is ensured; the system characteristics are judged through linear fitting, and the Kalman gain is calculated, so that the weighting between the predicted value and the measured value is more accurate.

The present invention proposes a digital full-wideband direct forwarding search and rescue radar transponder system, which proposes a new search and rescue radar transponder (SART) system architecture and a corresponding new coding and reading scheme. The system of the present invention adopts a direct forwarding system architecture, which combines digital broadband DRFM real-time forwarding technology and discontinuous point coding response architecture. The transmitting and receiving antennas work independently and simultaneously, and all radar interrogation signals within the working frequency band are directly encoded and forwarded indiscriminately, retaining the complete waveform information while realizing the encoding of the response information. The system of the present invention can be equivalent to a target with special target characteristics. After the radar signal within the working frequency band is irradiated to the target, an echo signal with fixed coding modulation characteristics will be generated.

An example system is provided. In some embodiments, the system may include a coupler. In some embodiments, the coupler may include a first ground layer. In some embodiments, the coupler may include a conductive layer. In some embodiments, the conductive layer is substantially infinite shaped. In some embodiments, the coupler may include a first dielectric layer positioned between the first ground layer and the conductive layer. In some embodiments, the coupler may include a second ground layer having an aperture. In some embodiments, the coupler may include a second dielectric layer positioned between the conductive layer and the second ground layer. In some embodiments, the system may include a feed path configured to transport a plurality of radio frequency identification transponders through a defined region proximate the coupler. In some embodiments, the system may include a controller.

The invention discloses a train cross-field driving control method, device and equipment and a storage medium. The method is applied to a train dispatching center and comprises the following steps: acquiring route information sent by a first radio block center, and analyzing the route information to obtain train running information; if the train running information contains train cross-field running forecast information, at least one ground transponder on a train cross-field running route is determined; and determining a target transponder from each ground transponder according to the train cross-field running forecast information, and sending a transponder identifier of the target transponder to a second radio block center, so that the second radio block center performs transponder configuration operation on the target transponder based on the transponder identifier of the target transponder, therefore, the train is controlled to run across the field. According to the method and the system, the radio block centers in different stations can be utilized, and the cross-field running forecast information contained in the train running information can be utilized to realize the cross-field running of the train, so that the running efficiency and the operation safety of the train are improved.

The invention discloses a distance measurement control method for track mobile equipment based on millimeter wave secondary radar. The distance measurement control method comprises the following five steps: S1, a vehicle-mounted interrogator generates a coding interrogation signal of a millimeter wave frequency band and transmits the coding interrogation signal to a transponder deployed along a track; s2, after a transponder receives the inquiry signal conforming to the predefined coding format, a millimeter wave response signal carrying a unique identity label is generated; s3, the vehicle-mounted receiver extracts an identity label and carrier phase information in the millimeter wave response signal to form an accurate distance measurement value resisting multipath interference; s4, the control unit fuses the accurate distance measurement value and the data of the vehicle-mounted sensor to generate real-time pose information with millimeter-level precision; and S5, the execution mechanism adjusts the operation state of the mobile equipment according to the dynamic control instruction, and cooperative operation or accurate parking control of the track mobile equipment is achieved. According to the millimeter wave secondary radar-based distance measurement control method for the track mobile equipment, the problems of high-precision continuous distance measurement and anti-interference control of the track mobile equipment can be solved.

The invention discloses a transducer installation position calibration method based on observation track optimization analysis, and relates to the technical field of marine survey, and the method comprises the following steps: constructing a joint estimation model of the installation position of a shipborne transducer and the position of a seabed transponder, and directly using the sound propagation time measurement between the seabed and the sea surface as an observed quantity; dimension expansion estimation is carried out on the installation position of the shipborne transducer; calculating an installation position error parameter by using a ray acoustic propagation model in combination with coordinate conversion calculation; according to the method, track optimization key influence factors are analyzed, a square track design of a bidirectional course angle is put forward, finally, shipborne transducer installation position error compensation and seabed transponder positioning result output are achieved, through the method, the shipborne transducer installation position error can be compensated, and the seabed transponder positioning precision can be improved.

The invention provides an iUSBL installation error calibration method independent of a fixed transponder and related equipment, and relates to the technical field of inverse ultra-short baseline installation errors. The method comprises the following steps: step 1, calculating coordinates of a transponder in an iUSBL coordinate system according to iUSBL direction finding and distance measuring information; step 2, calculating an origin coordinate of an iUSBL coordinate system under a navigation coordinate system by using UUV position and attitude information provided by iUSBL distance measurement information assisted INS integrated navigation and a lever arm; 3, establishing a theoretical relational expression between the coordinates of the transponder and the coordinates of the origin of the iUSBL coordinate system; 4, establishing a difference equation according to the theoretical relational expression; and 5, based on the difference equation, establishing an objective function and calculating an iUSBL installation error parameter by adopting a nonlinear least square solution. According to the iUSBL installation error calibration method, iUSBL installation error calibration without fixing the transponder can be realized, and the applicability and the flexibility of the iUSBL installation error calibration method are improved.