Indoor location and navigation method based on built-in inertial sensor of smart phone
A technology of inertial sensors and smartphones, which is applied in navigation, surveying and mapping, and navigation calculation tools, etc. It can solve the problems of difficult large-scale indoor coverage, high positioning costs, and unsupported mobile phones, and achieves wide application range and accurate direction calculation. Smart, labor-saving and cost-saving effects
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[0048] Such as figure 1 As shown, this embodiment provides a method for indoor positioning and navigation based on the built-in inertial sensor of a smart phone, and the method includes the following steps:
[0049] Step 1. Record the received accurate GPS positioning signal, and use the accurate GPS positioning signal as the initial position for positioning;
[0050] Step 2. After the GPS signal weakens or even disappears, use the sensor that comes with the mobile phone to record the distance and direction of the person in real time, so as to calculate the displacement of the person on the horizontal plane;
[0051] In this step, the distance traveled by the person is obtained by using the footstep detection algorithm to judge the situation of the person's walking by analyzing the change of the acceleration, which specifically includes two parts:
[0052] The first part, the calculation of the number of steps, the specific steps are:
[0053] 1. Calculate the combined accel...
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