Multi-geomagnetic sensor speed measuring system and speed measuring method

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of intelligent transportation, and further relates to a speed measurement system and method of a geomagnetic sensor, which can be used for intelligent traffic management. Background technique [0002] With the increase of car ownership and frequent occurrence of traffic accidents and traffic jams, intelligent traffic management is imperative. Intelligent transportation system is the main means of intelligent traffic management, information collection technology is widely used in intelligent transportation system. It is an indispensable part of the intelligent transportation system to measure the speed of the cars on the road through the vehicle speed measurement system and provide traffic data for the intelligent transportation system. After the intelligent transportation system obtains the speed information, it can identify the speeding vehicle and give a warning to the speeding vehicle, thereby avoiding t...

AI Technical Summary

Problems solved by technology

However, the optical sensor has high requirements on the environment, and the speed measurement effect will be affected when the weather is bad, such as smog; the life of the inductive coil sensor is short; when there are multiple vehicles driving side by side in the same direction, or when there are large vehicles passing by in the adjacent lane , the speed measurement system using microwave radar and traditional geomagnetic sensor is prone to failure to detect vehicles or wrong detection of vehicles, resulting in speed measurement errors

Traditional vehicle speed measurement systems lack practicability, reliability, safety, and limitations, and cannot meet the requirements of large-scale deployment

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