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Mobile navigation device

A technology of navigation device and movement amount, which is applied in the direction of measuring device, satellite radio beacon positioning system, instrument, etc., and can solve problems such as the bottleneck of power consumption of mobile devices

Active Publication Date: 2011-08-31
HTC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in these mobile applications, the power consumption of the mobile device itself has always been a technical bottleneck
Although there are many research and development results and patents for the power consumption of GPS receivers, the actual power savings still only account for a small percentage

Method used

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Embodiment Construction

[0020] The invention utilizes the dead reckoning technology and works with the existing GPS receiver to realize a new mobile navigation architecture. Dead reckoning (Dead Reckoning), referred to as DR, is a technology that uses the inertia of movement to detect the amount of movement of its position. The general DR mainly includes a gyroscope (Gyro) and an acceleration sensor (G-Sensor). In addition to detecting its own acceleration, speed, and moving distance, it can also detect changes in the direction of travel. The error range of the detection result of the dead reckoning module 120 may gradually increase with movement, but within a certain time or distance range, it still has a considerable degree of reliability. Since the dead reckoning module 120 consumes much less power than the satellite positioning module 110 (less than one tenth) in use, the satellite positioning module 110 and the dead reckoning module 120 can be used alternately under certain conditions. Maintain ...

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Abstract

The invention relates to a mobile navigation device, which alternately operates in first and second modes. In the first mode, a satellite positioning module is started up, a dead reckoning module is closed, and a processor calculates a position coordinate according to a satellite navigation signal. In the second mode, the satellite positioning module is closed, the dead reckoning module is started up, and the processor updates the position coordinate according to movement and rotation.

Description

Technical field [0001] The present invention relates to a mobile navigation device, in particular to a navigation and positioning method combining dead reckoning (DR) and a global positioning system (GPS) at the same time. Background technique [0002] The technology that uses artificial satellites distributed in the sky to provide ground positioning signals, such as the GPS system, is a free and open architecture. With the advancement of GPS receivers, mobile navigation devices have become a common application for both hands and one phone. For example, mobile phones, personal digital assistants, and car computers can be integrated with GPS receivers and navigation software to become mobile navigation devices. [0003] However, among these mobile applications, the power consumption of mobile devices has always been a technical bottleneck. During the navigation process, the GPS receiver must be kept on and continuously track the navigation signals of the artificial satellites in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/13G01S19/42
Inventor 谭云龙黄星强
Owner HTC CORP
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