894 results about "Single station" patented technology

A technique is disclosed involves a station (e.g., an IEEE 802.11 station, etc.) requesting that one or more frames be transmitted from an access point to the station. The station might have been in power save mode during Bluetooth operation for the purpose of causing the access point to queue frames that are intended for the station. The station making the request is collocated with the Bluetooth station or is, in fact, a single station that supports two protocols (i.e., has two parts), and is able to determine the regular timing of the Bluetooth synchronous connected oriented (SCO) packet transmissions. The requests to the access point for IEEE 802.11 frames are timed to cause the access point response frames to fall between the Bluetooth messages, thus managing potential interference.

The invention provides an optical measurement system and method for a three-dimensional shape of a large-scale complex curved surface member. The method is based on binocular optical grating projection measurement technologies, point cloud poses of all station positions during multiple station position measurement are obtained via a laser tracker and a corresponding target ball, point cloud obtained via the multiple station position measurement is converted to be under a unified laser tracker coordinate system according to corresponding pose data, and overall merging of point cloud data of a large-scale complex surface-shaped member can be realized; in the system, a six degree-of-freedom robot is used as a carrier for a point cloud space pose tracking unit and a binocular structured light measurement device, single station position measurement precision is ensured via calibration of the binocular structured light measurement device before measurement work starts, and data integrity and measurement efficiency are ensured via measurement route planning. Via the optical measurement system and method, all kinds of large-scale complex surface-shaped members can be accurately measured in non-contact conditions; practical, reliable and complete original three dimensional shape data can be provided for evaluation of all kinds of processing quality.

A method of processing a multicast frame in a wireless local area network (WLAN) and an apparatus supporting the method are provided. The method comprises receiving, at a station, a unicast frame from an access point (AP), the unicast frame including an unicast address indicating a single station which receives the unicast frame, receiving a multicast frame from the AP, the multicast frame including a group address indicating a group of stations which receives the multicast frame, determining whether the unicast frame is duplicated with the multicast frame, and discarding the multicast frame if the unicast frame is duplicated with the multicast frame.

A method for a robotic semiconductor wafer processing system to correct for wafers that have become offset or off-center during wafer processing. This is accomplished by determining the amount of offset and re-centering the wafer during wafer transport to the next process station using a single station sensor to locate the wafer center point. Each single sensor located at each station activates when the wafer's edge traverses through the sensor's path. Directional coordinates for the measured designated points on the wafer's edge are calculated, and the intersection points of two circles, analytically derived from using the measured designated points as their centers, are determined. The intersection point closest to the true wafer center position represents the measured wafer's center point. This point is compared to the true wafer center position, and the wafer is then adjusted for this difference.

The invention relates to a target localization and tracking system and a method. The system comprises a plurality of cluster localization modules and command control modules, each cluster localizationmodule comprises a plurality of sensor nodes and cluster head nodes, and each cluster head node comprises an initialization module, a particle filtration module, a particle weight calculation module,a re-sampling determination module and an estimation target state module. The method which combines Kalman and particle filtration is adopted for realizing the passive localization of a target, and the computation speed is far lower than the particle filtration method on the basis of realizing high-precision localization; the localization and the track of the target is finally realized by adopting multiple sensors and being based on the observation of the direction of the target, thereby being capable of overcoming the constraint that the traditional machine-mounted or ship-mounted single station system must carry out motorization during the observation period, having no need of observing the motorization of a platform, improving the flexibility of target localization, greatly increasingthe area of a region of target monitoring localization, avoiding the shortcoming of existence of localization blind regions and having very high effectiveness, accuracy and feasibility.

A seismic data acquisition apparatus having a recorder co-located with a sensor unit in a seismic spread and a communication device for direct communication with a central recorder. A memory located in the recorder and / or in the central controller holds location parameters associated with the sensor unit, and the parameters can be updated. Methods of seismic data acquisition including sensing seismic energy and recording the sensed energy at the sensor location. Delivering the recorded information to a central recorder by manually retrieving removable memory from each recorder, by wireless transmission of the information, or by removing the information from each recorder by inductive or cable connectors and a transfer device. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

The invention discloses an ultrasonic ranging method, belonging to the technical field of electronic measurements. The ultrasonic ranging method comprises the following steps that: an ultrasonic transmitter and a pulse laser are located at a transmitting end, the transmitting end receives a measuring command, subsequently, the pulse laser triggers a beam of pulse laser and the ultrasonic transmitter triggers an ultrasonic wave at the same time, and phase locking is carried out on the triggered ultrasonic wave and an external clock source; an ultrasonic receiver and a photodiode are located at a receiving end, after the photodiode receives the pulse laser, a timer is started, after the ultrasonic receiver acquires the received ultrasonic wave, the timer is stopped to acquire transition time; the transition time multiplies by a revised sound velocity to acquire a rough measurement value of a measured distance; and a phase difference is obtained, a fine measurement part is lambda delta omega / 2phi, and an actually measured distance d' is acquired, wherein d'=Nlambda+lambda delta omega / 2phi. The ultrasonic ranging method has the advantages that the receiver is easily interfered by the transmitter, a measurement blind zone is greatly reduced, the ultrasonic distance measuring directivity is improved, the distance measuring precision is improved within one ultrasonic wavelength; and the ultrasonic ranging method is particularly suitable for distance measurement in a single station type space orientation and measurement system.

The invention discloses a lightning detection and positioning system and method, which relate to the technical field of meteorological detection. The system comprises an antenna unit, a receiver unit, a waveform characteristic extracting and processing unit and a monitoring and controlling unit, wherein the antenna unit is used for detecting an electromagnetic field variation signal while lightning happens, detecting a GPS satellite signal and transmitting the electromagnetic field variation signal and the GPS satellite signal to the receiver unit; the receiver unit is used for receiving the electromagnetic field variation signal and the GPS satellite signal; the waveform characteristic extracting and processing unit is used for extracting electromagnetic field variation signal waveform characteristic parameters in real time and analyzing the parameters to obtain a cloud ground flash identification result and a ground flash positioning result; and the monitoring and controlling unit is used for collecting and storing the waveform of the electromagnetic field variation signal in real time, marking the time of collecting the lightning waveform and displaying the position of the ground flash in a geographical information system in real time. The system and method disclosed by the invention, multifunctional single-station lightning detection and positioning of the lightning waveform collection and lightning strike-back positioning can be carried out.

The invention discloses a multipath utilization through-the-wall radar imaging method based on the Bayes compression perception. A single station single transceiving antenna frequency stepping radar system is used for emitting pulse strings in multiple positions parallel to a wall face and acquiring echo signals; compression sampling is performed on the echo signals by randomly measuring a matrix so as to obtain relatively few measurement signals; then, by combining a dictionary construction compression perception model designed based on the multipath reflection characteristics of the wall face, the Bayes compression perception is used for reconstructing information of scenes after the wall face from the measurement signals; and finally the reconstructed information is sued for finishing through-the-wall radar imaging. According to the invention, cost is reduced; recording time is shortened; by use of the Bayes compression perception technology, calculation speed is quite fast, and required observation data are quite few; and the precision of images obtained through combination of the multipath utilization method is quite high and occurrence of false shadows is effectively inhibited.

The invention discloses an automatic single-station glaze spraying device. The automatic single-station glaze spraying device comprises a spraying room, a feeding mechanism, a working rotary table and a robot body. The spraying room is a semi-closed space with the front end face provided with an opening. The feeding mechanism is arranged outside the spraying room. The working rotary table is installed inside the spraying room and matched with the end, stretching into the spraying room, of the feeding mechanism so that an object on which glaze spraying needs to be carried out can be taken down from the feeding mechanism. The robot body is arranged at the opening, a spray gun of the robot body stretches into the spraying room so that the glaze spraying operation can be carried out on the object on which glaze spraying needs to be carried out on the working rotary table. The invention further discloses an automatic single-station glaze spraying method. Glaze aerial fog produced in the spraying room is exhausted out of a workshop through a ventilation channel through the structure of the semi-closed spraying room and a suction opening and processed, and the operating environment of the workshop is improved.

The invention discloses a network RTK (real-time kinematic) ambiguity resolution method based on an un-differential uncombined model. The un-differential uncombined model is used to estimate single-station un-differential ambiguity of a whole network, a satellite clock is used as an unknown parameter, and a real-time satellite clock bias product is added as a pseudo-observable; according to a user's position, un-differential ambiguity of stations adjacent to the user is extracted, one of the adjacent stations is selected as a reference station, integer features of double-difference ambiguity are acquired by reduction through difference operators, double-difference ambiguity results with the integer features are acquired by a single epoch method. The network RTK (real-time kinematic) ambiguity resolution method based on the un-differential uncombined model has the advantages that capacity of calculation for large-scale reference station networks can be effectively improved, the influence of barometric error and length upon double-difference ambiguity fixing is weakened, the double-difference model is less ill-conditioned, difference resistance of the model and ambiguity fixing success rate are increased.

The invention discloses a bending machine for a spiral light tube. The bending machine comprises a frame, a light tube clamping mechanism arranged on the frame, bending actuating mechanisms which are respectively arranged at two sides of the light tube clamping mechanism, a flame heating system arranged above the light tube clamping mechanism, and an automatic control system arranged in a distribution box outside the frame, wherein, the light tube clamping mechanism is used for fixing the current spiral light tubes of all specifications; the bending actuating mechanisms are positioned at the two sides of the light tube clamping mechanism and are used for clamping two pins and executing predetermined actions; the flame heating system is arranged above the light tube and is used for heating the designated positions of the pins and can slide up and down; and the automatic control system can carry out preset control on all the actions of the frame, and the main functional element of the automatic control system is a PLC (programmable logic controller). The bending machine has the advantages of single station, small volume, low cost and high production efficiency up to over twice as high as that in the case of manual operation, and is simple in operation.

The invention discloses a combined DOA and TOA single-station passive positioning method based on error correction. According to measurement information obtained by a receiving station of an externalradiation source radar system, by introducing an auxiliary variable, a nonlinear equation is converted into a pseudo-linear equation, a pseudo-linear model between the state of a target position and the state of an observation station position is established, an iterative least square method is adopted for estimation, a constrained total least square estimation model is constructed, a constrainedoptimization problem is converted into an unconstrained optimization problem, a Newton iteration method is used for optimization and solution, and the correlation between the auxiliary variable and the target position is used for constructing a correlation least square estimation model, so that the target positioning performance is further improved. The target positioning accuracy is improved through combined estimation of the target position and system errors. Convenience is provided for improving the target positioning performance, the complexity of error registration under the premise of ensuring the estimation performance is reduced, and good positioning performance in the case of large measurement noise is achieved.

An environmental condition detector emits only safe, validated verbal messages recorded in a user's voice to help occupants of a building respond safely to sensed environmental conditions. The message emitted in the user's voice is generally a familiar voice to other building occupants to better capture their attention, and only certain, safe, user messages are validated for use thereby eliminating the chance that the user may unknowingly record an unsafe message to be emitted during a sensed environmental condition. The verbal message is recorded by a user and is analyzed through speech recognition to determine if the user-recorded message can be validated as containing safe content. A user-recorded message found to match manufacturer preprogrammed message content is validated and selected to be audibly emitted in the user's voice when an environmental condition is sensed. Various embodiments include single station units, interconnected units, or centrally controlled security systems.

The invention discloses a distributed multi-target tracking method based on multi-source clusters aiming at solving the problems that an existing traditional distributed multi-target tracking method only utilizes the correlation between tracks and does not make full use of the correlation between measurement, consequently the information loss is caused, and the high computational complexity is caused by calculation of the correlation between the tracks. The distributed multi-target tracking method comprises the steps that firstly, data, received by all radars, at each moment are clustered; then the centers of all the clusters are calculated to serve as estimation of the positions of all targets at the moment; and finally a joint probabilistic data association algorithm is simplified basedon the nearest neighbor, multiple targets are tracked through a single station radar multi-target tracking method, and thus a target track is obtained. According to the distributed multi-target tracking method, the problems that in practical application, the information loss and the high computational complexity exist in traditional distributed multi-target tracking are effectively solved, multi-target tracking performance is improved, and a near target at a short range can also be effectively tracked.

The invention provides a network link establishment method for satellite formation networking. The satellite formation networking comprises a first satellite and at least one second satellite. The method comprises the following steps of: detecting whether the first satellite and the at least one second satellite are in a normal running state or not; if the first satellite and the at least one second satellite are detected to be in the normal running state, establishing a satellite-ground measurement and control link with a ground measurement and control system according to a first preset condition by using the first satellite, or establishing an inter-satellite link between the at least one second satellite and the first satellite in the normal running state according to a second preset condition; and bidirectionally transmitting own corresponding measurement and control information between the at least one second satellite and the first satellite, and bidirectionally transmitting own corresponding measurement and control information between the first satellite and the ground measurement and control system. In the method, the data of each satellite in the satellite formation networking can be acquired in a single-station single-satellite measurement and control way, so that the utilization rate of measurement and control resources is increased, and the reliability of the measurement and control way is improved.

Cooperating mobiles (ground vehicles, aircraft) are located and identified by Multilateration and Automatic Dependent Surveillance-Broadcast (ADS-B) techniques using the frequency band and the format of the Secondary Surveillance Radar (SSR) signals in high traffic situations. Standard messages, transmitted by the mobile on the downlink channel, i.e. to a set of fixed receiving stations, and including the identification code, permit the location of the mobile by multiple time measurements (Multilateration) from a subset of the set of fixed receiving stations; when the message contains the position (GPS and, later, Galileo datum) the mobile may be located with the ADS-B when in view even of a few stations or of a single station. In order to overcome the problem that arises with high traffic, i.e. the superimposition of signals, called garbling.

The invention discloses an airborne single-station passive positioning method for multiple broadband targets and mainly solves the problem that multiple broadband radiation source targets cannot be subjected to single-station passive positioning in the prior art. The method comprises the following implementation steps: (1) sampling a far-field broadband radiation source signal at the receiving end to obtain an observation signal; (2) performing band narrowing on a broadband observation signal received by an array element through FRFT; (3) building a signal vector I(k) of a k-th signal in an FRFT domain; (4) obtaining a time average autocorrelation matrix for the k-th signal by utilizing the signal vector I(K), and performing eigen value decomposition; (5) building a guide matrix in a distance form of the k-th signal; (6) performing sampling at the receiving end for L times, repeatedly executing the steps of (2) to (5), and searching a target function for a maximum value, wherein (xk,yk,zk) corresponding to a maximum value point serves as the coordinates of a target k. According to the airborne single-station passive positioning method for the multiple broadband targets, the multiple broadband radiation source targets can be subjected to single-station passive positioning. The method can be used for detecting and reconnoitering an unmanned flight platform and a manned flight platform.

The invention relates to the technical field of radar detection, in particular to multi-station lightning VHF (very high frequency) radiation source three-dimensional positioning method and system. The method includes: acquiring elevation of lighting arriving a single station through double antenna arrays vertically disposed at the single station, establishing an equation set by three or more single-station elevations, and calculating to obtain an occurrence three-dimensional spatial position of a flashing radiation source. The invention provides the lightning VHF radiation source three-dimensional positioning system based on the method. The system comprises at least three single stations and a data processing center. Each single station comprises a radiofrequency antenna array, a GPS (global positioning system) clock module, and a signal acquisition and processing module. Compared with the like prior arts, the method and system enable the detection range of the single station to be effectively enlarged, the antenna arrays and the data acquisition equipment to be simpler, and equipment cost and erection cost to be lower. The method and system are capable of detecting three-dimensional spatial evolution characteristics of lightning in large range, have the functions of early lightning warning, estimation on lightning danger area and fierce thunderstorm danger and the like, and provide effective information for lightning disaster prevention and severe convection weather warning.

The invention discloses a Beidou wide area timing system and method. The Beidou wide area timing method comprises the following steps: obtaining a phase observation value and a pseudo-range observation value of a China Beidou satellite navigation system of each ground Beidou tracking station network, time difference monitoring data of the time of the China Beidou satellite navigation system and the Beijing time of a laboratory atomic clock group, a satellite ephemeris of the China Beidou satellite navigation system, earth rotation and antenna phase center parameters; performing preprocessing of data check, gross error elimination and cycle slip detection on the obtained data; performing error model correction and fine data processing on the preprocessed data; encoding the corrected data togenerate a telegraph text, and uploading the telegraph text to a communication satellite for broadcasting; and performing, by a user, non-difference precise timing solution and time difference parameter correction on the received corrected data and the local observation data to obtain a user local time consistent with the standard time. By adoption of the Beidou wide area timing system and methoddisclosed by the invention, single-station wide area timing service can be achieved, the timing precision is high, the operability is high and the action range is limited.

The invention discloses a method for visually analyzing a city common bicycle system borrowing and returning mode. The method comprises steps that 1, the common bicycle data is collected and is further pre-processed; 2, a geographic view is designed on the basis of the spatial perspective, geographic position distribution of a station is visually displayed, a space filtering function is further provided, and an analyzer is facilitated to interactively select a station or a station set; 3, on the basis of the time perspective, a single station borrowing and returning time domain heat view is designed; a visual coding mode similar to a table is employed to display borrowing and returning change and difference of a certain station at different time segments; 4, on the basis of the spatial perspective, a station borrowing and returning association view is designed, and multiple-to-multiple station borrowing and returning relationships are displayed; and 5, a multi-attribute view is designed. The method is advantaged in that understanding of traffic management staff about an operation situation of a common bicycle system can be effectively improved, data analysis efficiency is improved, and auxiliary decision is provided for station management and vehicle scheduling.

An ADS-S control workstation data processing system is provided, which comprises an input data processing module, a single ground station tracking module and a multiple ground station tracking module. The input data processing module preprocesses the input ADS-B message and sends corresponding alarming information to mistaken message; the single ground station tracking module processes the status message data, mode message data, service message in each single station ADS-B message, establishes the track of each single station according to the starting point of track and maintains the ADS-B track linked list of single station via track renewal and termination; the multiple ground station tracking module tracks a plurality of ADS-B ground stations according to the established single ADS-B track, ensures the overload protection for system capacity, establishes a multiple ADS-B system track for each object according to the starting point of track and maintains the ADS-B track linked list of single station via track renewal and termination. Therefore, the invention aims at ADS-B processing and lowers down the complexity for processing.

The invention discloses an integrated real-time correction system for atmosphere convection layer and ionized layer radio wave refraction errors, which comprises a microwave radiometer, a single-station GPS (Global Positioning System) and an integrated real-time correction unit, wherein the microwave radiometer is used for detecting a convection layer refractivity profile; the single-station GPS is used for detecting an ionized layer electron density profile in real time; and the integrated real-time correction unit is used for calculating radio wave refraction error corrections in real time by adopting a ray tracing method based on the convection layer refractivity profile, the ionized layer electron density profile and the apparent distance and the apparent elevation angle parameter of a detection target, wherein the radio wave refraction error corrections comprise a distance error correction, an elevation angle error correction and a speed error correction. The integrated real-time correction device for atmosphere convection layer and ionized layer radio wave refraction errors overcomes the defect that the parameters of a convection layer and an ionized layer cannot be simultaneously detected by adopting the traditional method, realizes the real-time correction of the radio wave refraction errors of the convection layer and the ionized layer, has the advantages of high accuracy, good real-time performance, unattended operation, strong mobility, low cost, simplicity in operation and the like, and provides a technical support for improving the accuracy of systems for aerial survey, deep-space survey, ballistic trajectory measurement and the like in China.

The invention relates to a single-station welding and dust exhausting device which comprises a dust air return port (1), a dust backflow pipe (2), an active filter cotton placing box (3), a draft fan (4) and a switch (8) and is characterized in that the dust air return port (1) is located above a welding workpiece (6) and connected with the upper end of the active filter cotton placing box (3) through the dust backflow pipe (2), the lower end of the active filter cotton placing box (3) is connected with the draft fan (4), and the draft fan (4) is fixed on a welding clamp base surface (5). The single-station welding and dust exhausting device enables a dedusting device and a welding clamp to be effectively combined, greatly reduces manufacture cost, saves space, and simultaneously improves operation environments of staff.

The invention discloses a single-station user terminal locating method and a system. The method comprises that position information of a plurality of known points in a community is obtained, the position information comprises a signal reaching angle, time advance and longitude and latitude information; information of the signal reaching angle and the time advance of a point to be located is obtained; at least one known point with the signal reaching angle and the time advance most approximate to the signal reaching angle and the time advance of the point to be located is found according to the position information of the known point; and the longitude and latitude information of the point to be located is calculated according to the longitude and latitude information of at least one found known point. According to the single-station user terminal locating method, at least one known point near to the point to be located is found, and longitude and latitude of the point to be located are calculated through the longitude and latitude of at least one known point. The single-station user terminal locating method can solve the problem that a traditional locating method is not accurate caused by multi-diameter or non-direct waves, and can locate accurately under the condition of many obstacles including buildings and the like.

The embodiment of the invention discloses a method for implementing group calling end-to-end encryption for mobile cluster comprising: transmitting session key request to calling encryption module, the session key request carrying group ID of group calling; receiving the session key of group key encryption corresponding to the group ID returned by the encryption module; transmitting the encrypted session key to called mobile station. In the embodiment, end-to-end encryption cluster group calling can be still performed under single station cluster mode or KMC failure or end-to-end encryption application context of through mode; KMC is not needed to participate in session key generation and distribution in end-to-end encryption group calling, which largely reduces load of KMC and calling establishment time delay of end-to-end encryption of cluster group calling.

The invention discloses a target radiation source initial position estimation method for single-antenna single-station passive positioning. The target radiation source initial position estimation method comprises the technical measures of (1) target radiation source positioning iterative solution and position estimation, and (2) target radiation source position initial estimation. In a single-antenna single-station passive positioning system device, since a satellite platform moves to generate a plurality of different positions, the target radiation source initial position estimation method utilizes TOA to estimate a target radiation source initial position, then utilizes a Taylor series linear term expansion to reduce complexity of positioning iterative calculation, and solves the problem of fast positioning convergence; and the single-antenna single-station electronic reconnaissance positioning system can greatly reduce cost, power consumption, weight and size of the system, and is very suitable for engineering application.