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.
CN1948910AInactive Publication Date: 2007-04-18上海复旦科技园股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海复旦科技园股份有限公司
Publication Date
2007-04-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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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