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A low-power positioning method based on accelerometer and GPS

A technology of GPS positioning and positioning method, which is applied to satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of high positioning power consumption and low positioning accuracy, achieve high positioning accuracy, ensure positioning accuracy, and reduce positioning The effect of power consumption

Active Publication Date: 2019-10-18
陕西远海探科电子科技有限公司
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a low-power positioning method based on accelerometer and GPS, the purpose of which is to obtain the initial positioning point through GPS when the GPS positioning function is turned on by periodically switching on and off the GPS , when the GPS positioning function is turned off, the initial positioning point is obtained through the accelerometer, and the positioning is calculated according to the three-dimensional acceleration projection information obtained by the acceleration, so as to reduce the power consumption in advance before ensuring the positioning accuracy, thus solving the positioning power consumption in the prior art High technical problems and low positioning accuracy

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  • A low-power positioning method based on accelerometer and GPS
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  • A low-power positioning method based on accelerometer and GPS

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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0039] The present invention provides a positioning method capable of reducing power consumption on the premise of ensuring positioning accuracy, such as figure 1 As shown, the main working process includes the following aspects:

[0040] A. Displacement calculation: The terminal integrates an accelerometer to sense the changes in acceleration in the X, Y, and Z directions, and integrate in a s...

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Abstract

The invention discloses a low-power consumption positioning method based on an accelerometer and a GPS. The method comprises following steps of (1) if a GPS positioning function is in a usable state, using the GPS to acquire an initial positioning point, and if the GPS positioning function is in an unusable state, directly using the accelerometer to acquire the initial positioning point; (2) using a map matching method to match the initial positioning point to a proper road so as to reduce positioning errors and obtain a positioning point after the matching, and using the matching point after the matching as the initial position of the accelerometer; (3) using the accelerometer to acquire real-time three-dimensional acceleration speed projection information of each moment; and (4) using the initial position of the accelerometer and the real-time three-dimensional acceleration speed projection information of each moment to acquire the positioning information of the current moment. According to the invention, by periodically starting the GPS positioning function, combining positioning calculation of the accelerometer, and combining the map matching method for carrying out road matching, power consumption can be reduced under the premise that the positioning precision is ensured.

Description

technical field [0001] The invention belongs to the technical field of mobile positioning, and more specifically relates to a low-power positioning method based on an accelerometer and GPS. Background technique [0002] With the continuous popularization of smart terminals (such as smart phones, smart bracelets, smart watches, etc.), terminal location acquisition has become a basic service, providing the basis for map positioning, location navigation, location-based services (Location Based Service), etc. condition. [0003] However, there are two major flaws in the current positioning of smart terminals. First, the power consumption of smart terminal positioning is very large. For example, smart phones can only support continuous GPS positioning for 5 hours to 6 hours, and smart bracelets and smart watches can only support continuous GPS positioning for less than half a day. Location acquisition and services pose great challenges to terminal battery life. Second, in plac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/49
Inventor 夏彩琴邓柱杰
Owner 陕西远海探科电子科技有限公司
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