Automobile dead reckoning positioning method and module

Abstract

The disclosed dead reckoning and positioning method combines satellite positioning data and comprises: receiving GPS signal, while detecting continually the vehicle angle and velocity; according to effective satellite number and horizontal error and the latitude and longitude variable error, deciding the reliability of GPS data flow for accurate positioning. This invention has well autonomy and precision, and will play important role in future satellite navigation technique and vehicle drive record technique.

Description

technical field [0001] The invention relates to a vehicle dead reckoning positioning method combined with satellite positioning data and a corresponding positioning module. Background technique [0002] In modern vehicle satellite navigation and positioning technology, satellite positioning technology is widely used, such as the global positioning system (GPS) of the United States, GLONASS of Russia, and Beidou positioning system of China; With a GPS receiver installed on the vehicle, as long as the GPS receiver is installed on the vehicle, if the four satellite signals can be guaranteed to be received well, the vehicle's position, speed, direction of movement and other elements can be accurately known, and the control system can realize navigation by referring to the electronic map. [0003] The traditional inertial navigation technology using angular velocity sensors and acceleration sensors can realize the autonomous positioning of vehicles. The accumulative error of bra...

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Problems solved by technology

[0003] The traditional inertial navigation technology using angular velocity sensors and acceleration sensors can realize the autonomous positioning of vehicles. The accumulative error of braking and acceleration will be very large. Generally, the odometer of the car is used to measure the speed of the car.

[0004] Due to the popularization of automobiles and the maturity of GPS, more and more satellite navigation systems are used in automobiles. The basis of vehicle satellite navigation systems is to accurately and continuously locate automobiles. The reason is that satellite signals cannot be received in many areas; and due to the multipath effect of radio waves brought by large urban buildings, the positioning accuracy of GPS is greatly reduced; in jungle areas or in cities with tall trees, due to the influence of leaves on radio waves GPS positioning is unreliable; the consequence is that it cannot provide continuous and accurate vehicle positioning, which affects the use of satellite navigation systems; in mountainous areas and roads with many tunnels, when using GPS as the basis for driving records, it will also cause driving problems. Incomplete or wrong data recording

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