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226 results about "Locating engine" patented technology

A locating engine is the computational engine behind real-time locating systems and navigation support system. A locating engine combines algorithms of geometry or topography with algorithms of filtering to calculate a best estimate for objects or people, and to do so in real-time. The locating engine is the implementation of the algorithms for determining the equations of coordinates from inverting matrices of distances. Many different approaches can be used in creating a location engine, but all modern systems are based on multilateration or triangulation and least squares.

Method and apparatus for optimizing GPS-based position location in presence of time varying frequency error

Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn may affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is very important for position location, because poor quality GPS doppler measurements may prevent the wireless communication device from acquiring satellites in the most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use in position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a position location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and / or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
Owner:QUALCOMM INC

Planning engine for a parcel shipping system

A planning engine for use in a planning system which is in turn used to plan shipment of a parcel of at least one item, the planning including routing and rating the shipment. The planning system, of which the planning engine is a component, includes a router for determining possible routes for the shipment (each route a carrier and a service), a rater for rating each possible route, a consolidator for attempting to consolidate a list of shipments, and a prorater for allocating costs of a consolidation among the consolidated shipments, and also has read and write access to a shipping database. Its component planning engine includes: an input module for providing a list including each shipment for which planning is to be performed; a load list template builder, responsive to the list including each shipment for which planning is to be performed, for providing a load list template indicating at least one load, each load having an associated stop, each stop having an associated shipment, each shipment having at least one associated item; an analyzer, responsive to the load list template, for planning in turn how to ship each of the shipments indicated by the load list template by making use of the router and the rater, for providing a load list indicating a carrier and service for each shipment of the load list template; and an output module, for providing the load list in a manner corresponding to the form of the planning request information.
Owner:PITNEY BOWES INC

Car keyless entry system based on proximity perception of a smartphone and control method

The invention discloses a car keyless entry system based on proximity perception of a smartphone. The car keyless entry system comprises an information request module, a real-time positioning engine module, an information sending module, a vehicle-mounted device and a cloud platform, wherein the information request module, the real-time positioning engine module and the information sending moduleare arranged in the smartphone; the information request module is used for requesting information for the cloud platform; the real-time positioning engine module is used for realizing accurate and reliable space positioning of the smartphone relative to a car; the vehicle-mounted device includes a vehicle-mounted iBeacon base station, a vehicle-mounted bluetooth communication module, an information processing module, a car door controller module and an engine controller module, and the information processing module is used for induction-controlling a vehicle-mounted controller according to thechange of the spatial position information of a user relative to the car; the cloud platform is used for pre-storing UUID and MAC address information of the vehicle-mounted iBeacon base station of each car and a bluetooth fingerprint database and threshold information which correspond to each car type. According to the car keyless entry system, interference-free car entry control and location service are conducted through highly reliable human-car relative positioning.
Owner:WUHAN UNIV

Stepping inquiry-response locating system for flight data recorder

The invention discloses a stepping inquiry-response locating system for a flight data recorder. The stepping inquiry-response locating system comprises a flight data recorder (FDR) airborne triones locating device and a ground mobile searching and locating device, wherein the FDR airborne triones locating device is installed in the flight data recorder; and the ground mobile searching and locating device is installed in a mobile ground station for search and rescue. The stepping inquiry-response locating system for the flight data recorder adopts a triones navigating and locating system, an inquiry-response mode and a multi-point locating system, and transmits a radio data packet which contains an identification code and position coordinates and has a designated response signal frequency,a searching and locating method comprises a mutual corroborating mode of the position coordinates of a cooperative and related locating algorithm, so research and rescue personnel can quickly find the flight data recorder of a wrecked airplane according to the received triones coordinate information and designated frequency, accordingly, the purpose of quickly finding an object is realized, a great deal of manpower, resources, financial resources and time can be saved, and the rescue efficiency is improved.
Owner:CIVIL AVIATION UNIV OF CHINA

Mobile station location device and method based on TDOA location and location device based on mobile station location device

The present invention relates to the TDOA location technology field, especially to a mobile station location device and method based on TDOA location and location device based on mobile station location device. Any extra auxiliary device is not needed, there is no any difference between a mobile station and a fixed station about the participation in a location process, it is only needed that a location engine performs data processing of the mobile station, and a plurality of modes are employed to realize position location of the mobile station. All the location stations can perform synchronization processing; all the location stations broadcast location information; all the location stations receive location information broadcasted by other location stations and upload related time stamps and location information corresponding to the location station to the location engine in real time for storage; the location engine obtains a distance value or a distance difference related to the mobile station according to the fixed station position information and the related time stamp; and based on the distance value or the distance difference and the fixed station position coordinate information, a correlation positioning method is employed to obtain coordinates of the mobile station.
Owner:成都四相致新科技有限公司

Regional target IP locating method based on path features

ActiveCN105227688AImprove reliabilityIncrease the error rateTransmissionIp addressComputer science
The invention discloses a regional target IP locating method based on path features. The method comprises the following steps: A, selecting a plurality of regions in which a target IP is possibly located as destination regions; B, selecting a plurality of landmark IPs located in each of the destination regions, and acquiring communication paths from a detection source to the plurality of landmark IPs in each of the destination regions; C, calculating candidate features of each of the destination regions according to all intermediate router interface IP addresses on each of the communication paths and the numbers of hops between intermediate routers and the detection source; D, calculating the path features of each of the destination regions according to the obtained candidate features; E, acquiring a communication path from the detection source to the target IP, and calculating a path feature of the target IP; and F, calculating similarity between the path feature of the target IP and the path features of each of the destination regions, and selecting a locating region of the target IP. Through adoption of the method, high error rate due to IP locating through time delay of dynamic change between nodes is avoided, and the reliability of target IP regional locating is enhanced.
Owner:PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU

Construction safety protection early-warning system and method based on real-time positioning

The invention discloses a construction safety protection early-warning system and method based on real-time positioning, and the system comprises a positioning tag with a relay and a positioning tag at a construction site. The positioning tag with the relay transmits the distances between the positioning tag with the relay and base stations I, II and III to a communication base station. The positioning tag transmits the distances between the positioning tag and the base stations I, II and III to the communication base station. The communication base station communicates with a comprehensive management display terminal and a positioning engine server, and transmits the distance information. The early-warning method comprises the following steps: obtaining the space coordinate position and acorresponding time value, calculating the distances between devices in a construction operation region, and judging whether the distances exceed an early-warning threshold value or not, and giving asound and light alarm. The system and method are strong in anti-interference capability, reduces the safety management risk, and improves the safety management level and comprehensive benefits of building construction. The system and method facilitate the wide popularization and application for building construction enterprises.
Owner:CHINA RAILWAY FIRST GRP CO LTD
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