A low-power positioning method based on periodic switch GPS

Abstract

The invention discloses a low-power consumption positioning method based on a periodical switch GPS. The method comprises steps of (1) acquiring real-time three-dimensional acceleration speed projection information, and acquiring a positioning point of the current moment according to previous position point and the real-time three-dimensional acceleration speed projection information; (2) matching the positioning point to a proper road by use of the map matching method so as to obtain a matched positioning point; (3) judging whether a GPS positioning period is reached, if not, updating the GPS positioning period, and returning to the step (1) to continuously carry out positioning calculation, and if yes, open the GPS and entering the step (4); and (4) judging whether the GPS positioning is available, if yes, reading the position of the GPS and using the position as an initial positioning point and then returning to the step (1) to continuously carry out positioning calculation, and if not, returning to the step (1) to continuously carry out positioning calculation. According to the invention, by periodically starting the positioning function of the GPS, combining the positioning calculation of an accelerometer, and combining the map matching method to carry out road matching, it can be ensured that power consumption is reduced under the premise of ensuring the precision.

Description

technical field [0001] The invention belongs to the technical field of positioning, and more specifically relates to a low-power positioning method based on periodically switching 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 places wh...

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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 periodically switching 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 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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