Combined positioning method and apparatus using GPS, gyroscope, speedometer

A technology of GPS positioning and combined positioning, which is applied in the field of GPS positioning and can solve the problem that GPS cannot be positioned.

Inactive Publication Date: 2007-04-18
上海复旦科技园股份有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a positioning method and device that has high positioning accuracy and can solve the defect that GPS cannot be located when it is blocked

Method used

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  • Combined positioning method and apparatus using GPS, gyroscope, speedometer
  • Combined positioning method and apparatus using GPS, gyroscope, speedometer
  • Combined positioning method and apparatus using GPS, gyroscope, speedometer

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Embodiment Construction

[0047] The specific implementation manner of the present invention is described with reference to the accompanying drawings.

[0048] Figure 1 is a composition structure diagram of the whole system. The main processing module 1 of the system adopts an embedded system based on ARM9, and the CPU adopts Samsung S3C2410 (based on ARM920t). The processing module 1 is connected with the GPS module 3 , the inertial navigation module 4 and the output module 2 . The inertial navigation module 4 collects the output signals of the MEMS gyroscope and the odometer, processes and packs them and outputs them to the processing module through the serial interface. The GPS module outputs serial positioning data conforming to the NMEA 0183 ASCII specification through the serial interface. The output module receives the output information of the processing module, and displays the positioning information combined with the electronic map on the liquid crystal display.

[0049] FIG. 2 is a hardware...

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Abstract

The invention relates to GPS and MEMS gyroscope and speedometer combination location method and device. While the GPS signal is good, it uses the GPS location signal to locate, rectifies by the MEMS gyroscope and speedometer, synthesize the signal by Kalman filtering algorithm. While the GPS is lost, or the number of the receiving satellite is less than three, it switches to MEMS gyroscope and speedometer to locate. The combination navigation can improve GPS location precision, makes up the unable location defect caused by the GPS is covered.

Description

technical field [0001] The invention belongs to the technical field of GPS positioning, and in particular relates to a combined positioning method and device for correcting GPS positioning signals by using MEMS gyroscopes and odometers, and switching positioning modes when the GPS loses satellites to realize uninterrupted positioning. Background technique [0002] At present, the GPS positioning system has been widely used, and the GPS positioning accuracy is related to the received satellite signal strength. When receiving more than 3 satellite signals, the positioning is accurate; when receiving 3 satellite signals, the positioning is relatively reluctant; when receiving less than 3 satellite signals, the positioning information cannot be output. Due to the limitation of the geographical environment, the signal strength received by the GPS receiver will be greatly reduced in occluded environments such as mountains, tunnels, and urban buildings, and even satellite signals w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/26G01C21/28G01C21/16G01C21/18G01S5/02G01S5/14G01S19/03
Inventor 陆起涌林绿洲王力超
Owner 上海复旦科技园股份有限公司
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