gyroscope | 易学教程

iOS: Movement Precision in 3D Space

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问题 From what I understand, GPS has limited accuracy. Is it possible to get a more precise location for a person in 3D space? I\'m planning to write an application where users will move with their phones in any direction, but only need to move a few feet. Is there any technique, maybe with the accelerometer and gyroscope that would enable this degree of accuracy? For example, the user holds the phone flat (so that the bottom of the phone runs parallel with the floor). There is something drawn on

How can I find distance traveled with a gyroscope and accelerometer?

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I want to build an app that calculates accurate Distance travelled by iPhone (not long distance) using Gyro+Accelerometer. No need for GPS here. How should I approach this problem? Basic calculus behind this problem is in the expression (and similar expressions for displacements in y and z) and basic geometry is the Pythagorean theorem So, once you have your accelerometer signals passed through a low-pass filter and binned in time with sampling interval dt, you can find the displacement in x as ( pardon my C... ) float dx=0.0f; float vx=0.0f; for (int i=1; i<n; i++) { vx+=(acceleration_x[i-1]

Getting displacement from accelerometer data with Core Motion

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问题 I am developing an augmented reality application that (at the moment) wants to display a simple cube on top of a surface, and be able to move in space (both rotating and displacing) to look at the cube in all the different angles. The problem of calibrating the camera doesn\'t apply here since I ask the user to place the iPhone on the surface he wants to place the cube on and then press a button to reset the attitude. To find out the camera rotation is very simple with the Gyroscope and Core

How to access accelerometer/gyroscope data from Javascript?

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问题 I have recently come across a few websites that seems to access the accelerometer or gyroscope on my laptop, detecting changes in orientation or movement. How is this done? Must I subscribe to some kind of event on the window object? On which devices (laptops, mobile phones, tablets) is this known to work? NB : I actually already know (part of) the answer to this question, and I am going to post it right away. The reason that I am posting the question here, is to let everyone else know that

How can I find distance traveled with a gyroscope and accelerometer?

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问题 I want to build an app that calculates accurate Distance travelled by iPhone (not long distance) using Gyro+Accelerometer. No need for GPS here. How should I approach this problem? 回答1: Basic calculus behind this problem is in the expression (and similar expressions for displacements in y and z) and basic geometry is the Pythagorean theorem So, once you have your accelerometer signals passed through a low-pass filter and binned in time with sampling interval dt, you can find the displacement

Indoor Positioning System based on Gyroscope and Accelerometer

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问题 I am developing an Android App to track indoor position. My phone is an Google Nexus S using two sensors, the first being an Accelerometer and the second being a Gyroscope. My idea is that from a starting reference point (a known GPS position), using the 2 sensors (accelerometer for motion and Gyro for directions) track the phone when moving. And display on a map when the user is going. But the problem is that i have no idea how to combine both of these sensors to give me an actual position?