gyroscope

Android: Magnetometer data deviates

时光怂恿深爱的人放手 提交于 2019-12-08 06:11:39
问题 I am trying to estimate heading from the accelerometer, gyro and magnetometer data. I have implemented A Complementary Filter from here. What I am trying is that I am holding the phone in my hand and I walked 15 steps in a straight line and I am trying to estimate Euler angles as given in the link above. But when I plot the raw data, I observe that the magnetometer data deviates. Here are the images of raw sensor data. My question is: how do I estimate Euler angles so that they indicate I am

Gyroscope with compass help needed

↘锁芯ラ 提交于 2019-12-07 17:03:50
问题 I need to have a game object point north AND I want to combine this with gyro.attitude input. I have tried, unsuccessfully, to do this in one step. That is, I couldn't make any gyro script, which I found on the net, work with the additional requirement of always pointing north. Trust me, I have tried every script I could find on the subject. I deduced that it's impossible and probably was stupid to think it could be done; at least not this way (i.e. all-in-one). I guess you could say I

Accelerometer, Gyro, and Magnetometer

和自甴很熟 提交于 2019-12-06 08:12:51
问题 I'm new to Core Motion and I'm very confused. Can somebody please explain what these inputs measure and how they can be useful in simple terms? 回答1: Accelerometers measure movement relative to gravity, by virtue of "feeling" the force of movement applied to the device. Force of movement can be described as the rate of acceleration and deceleration of the device, hence the name of this sensor. Gyroscopes measure changes in rotation by virtue of a suspended element reporting its rotation

Gyroscope with compass help needed

女生的网名这么多〃 提交于 2019-12-06 02:21:14
I need to have a game object point north AND I want to combine this with gyro.attitude input. I have tried, unsuccessfully, to do this in one step. That is, I couldn't make any gyro script, which I found on the net, work with the additional requirement of always pointing north. Trust me, I have tried every script I could find on the subject. I deduced that it's impossible and probably was stupid to think it could be done; at least not this way (i.e. all-in-one). I guess you could say I surmised that you can't do two things at once. Then I thought possibly I could get the same effect by

Drawing in air with Android phone

爷,独闯天下 提交于 2019-12-05 03:21:43
I am working on an application to draw in the air with an android phone. As my phone is moving, thanks to the acceletometer, i retrieve the acceleration on each axis ax, ay, az. What I am interested in is: x,y,z. From what I read in forums and in some tutorials, integrating the accelaration twice gives huge errors. So what is the best solution for me to get information on the deplacement of the phone? Thanks for your help. Ali Not exactly what you are looking for: Store orientation to an array - and compare Tracking orientation works well. Perhaps you can do something similar with the

Position calculation of small model of a car using Accelerometer + Gyroscope

…衆ロ難τιáo~ 提交于 2019-12-04 19:33:31
I wish to calculate position of a small remote controlled car (relative to starting position). The car moves on a flat surface for example: a room floor. Now, I am using an accelerometer and a gyroscope. To be precise this board --> http://www.sparkfun.com/products/9623 As a first step I just took the accelerometer data in x and y axes (since car moves on a surface) and double integrated the data to get position. The formulae I used were: vel_new = vel_old + ( acc_old + ( (acc_new - acc_old ) / 2.0 ) ) * SAMPLING_TIME; pos_new = pos_old + ( vel_old + ( (vel_new - vel_old ) / 2.0 ) ) * SAMPLING

Android accelerometer and gyroscope

限于喜欢 提交于 2019-12-04 15:44:48
问题 Is there any application that is available which I can try out to see the difference between using an accelerometer and gyroscope (where the lag is evident while using an accelerometer). I get the theoretical aspect of using a gyroscope over an accelerometer. But I would like to see it visually. 回答1: Well, not an app but in this video, starting from 21:55, there is a demo. 来源: https://stackoverflow.com/questions/7383012/android-accelerometer-and-gyroscope

Testing hardware support in Javascript for device orientation events of the iPhone 3GS

懵懂的女人 提交于 2019-12-04 12:02:47
问题 I'm trying to use HTML5 deviceOrientation events in Javascript to rotate an image when the user rotate his iPhone around him. I use this code to detect when the gyroscope is moving : window.addEventListener('deviceorientation', function (e) { alpha = e.alpha; beta = e.beta; gamma = e.gamma; }, true); It really works well on iPhone 4+ and iPad 2, but there's no gyroscope on the 3GS (and older iPhones). That's why I'm testing the deviceOrientationSupport like this : if(window

Using the Android gyroscope in Unity3d, how can I set the initial camera rotation to the initial mobile device rotation?

橙三吉。 提交于 2019-12-04 11:30:22
I want to use the Android gyroscope to perform head tracking on the standard First Person Controller of Unity3d. I created a short script that rotates both the parent node and the camera child node of the First Person Controller. The script is attached to the camera. This script works very well, it rotates the first-person view based on the movements of my mobile device. However, it only works when I hold my phone in a forward looking position when I start my app. If my phone lies flat on the table and I start my app, both the camera and gyroscope rotations are off. I would like my script to

How to calculate Heading using Gyro and magnetometer

强颜欢笑 提交于 2019-12-03 16:14:58
I have raw data of Gyroscope and magnetometer. on basis of this data, i have to calculate Heading information with an accuracy of 1Deg. I would like to know, is there any algorithm which can help me to get heading info using available information with mentioned accuracy? Any article or any link also will be helpful. Thanks I am assuming you are using phone to collect gyroscope+magnetometer data. You cannot calculate Heading with Gyro+Magnetometer unless you know initial state of device. You have to try Accelerometer+Magnetometer . You can get heading values from rotation-matrix' or yaw`