42results about How to "Easy to deploy at scale" patented technology

The invention discloses a multi-geomagnetic sensor speed measurement system and a speed measurement method, which mainly solve the problem of low measurement accuracy in the prior art. It includes a geomagnetic vehicle detection module, a data sending module, a data receiving module and a background data processing module. During the measurement, the geomagnetic vehicle detection module collects the geomagnetic data when the vehicle passes by and processes it to obtain time data; the background processing module receives the data for data cleaning; the background processing module selects the reference sensor and opens up each time window; The number of data is processed accordingly; when multiple inspections are performed, the measurement threshold δ is set and the time data is merged according to the threshold δ; when the missing inspection is missed, the interpolation method is used to complement the missing inspection data; the minimum variance method is used to estimate the speed of the vehicle according to the alignment result . The invention solves the problems of low accuracy and difficult implementation of a single geomagnetic sensor, realizes high-precision and low-cost vehicle speed measurement, and can be used for intelligent traffic management.

The invention discloses a vehicle positional information compressing and acquiring method, terminal, and system and relates to the technical field of location-based service. The method comprises steps that a terminal acquires the position and the speed data sequence of a vehicle where the terminal is located in order to perform curve fitting on the data sequence, just sends a curve characterization parameter and auxiliary data to a central end so as to achieve compression and acquisition; the terminal resolves position coordinates by using an acceleration module when a navigation satellite signal is lost; the terminal temporarily stores data when a mobile network signal is lost and sends the data when the mobile network signal is restored; the central end operates a decompression algorithm to resolve the locus of the vehicle according to the vehicle data curve characterization parameter. The method is used for monitoring vehicle positions and dispatching vehicles, achieves data compression at the acquisition terminal so as to relieve system load, and solves a data compressing and acquiring problem in a simple way when the navigation satellite signal is lost temporarily or lost.