accelerometer

问题 I have a device to run (gsensor, MPU6050) with an Android system. I can't build it directly because it does not exist with the 3.4 kernel, but I wonder if I can modify the MPU3050 driver for my device works. I have found this readme, but I wonder if it will work ? Edit: After half of work*, here a part of dmesg : <7>[ 13.283019] i2c-core: driver [mpu3050] registered <6>[ 13.283119] init: command 'insmod' r=0 <4>[ 13.312403] industrialio: module is from the staging directory, the quality is

问题 I would like to use the accelerometer to move my player sprite. If the sprite is going straight and the player tilts a little to the left, the sprite should rotate a little bit to the left, and same for the right. I also want to detect how much the player has tilted the device and turn the sprite accordingly. e.g. If the player tilts the device a lot the sprite should rotate 90 degrees rather than 45 for a quick tilt in a direction. How does one do this. Detect the device movement in any

问题 I have a background service which is running all the times and collects sensor data. But when the screen dims, it stops collecting the data. I want it to collect even in this case. My device is HTC MyTouch. I have tried prtial wake lock, buy it didn't work. Can anyone please help me fix this problem. Thanks Sowmya 回答1: This is a documented issue: http://code.google.com/p/android/issues/detail?id=3708 Unfortunately no easy fix exists and the workarounds also don't always work. It seems to be

问题 I was wondering if I can calculate the velocity of the phone using accelerometer sensor. What I mean is someone swing the phone once and I can measure velocity or force which was used to do this... or any other which can tell how powerful swing was:D After playing with accelerometer for a while(in VS and emulator) I see it works a little different that I though. Is it possible to achieve something like this? 回答1: No, not accurately. Although my previous answer here is about position, the same

问题 I am looking to record mobile accelerometer data (x/y/z) and adjust it to be consistent irrespective of the orientation/rotation of the phone. The usecase here is to record and normalize these parameters while driving to detect turns/twists etc. A key element of this is to ensure that the reported data is independent of how the phone is oriented in the car. I am using gyronorm.js to get the device motion and orientation details. I've looked at previous answers related to this topic on SO

问题 I am writing an An app in Android that needs to know the angle the rear camera is pointing with respect to the horizon and not with respect to it's last position. All of the definitions i have read for the compass and accelerometer don't say that i can do this. Is it at all possible to do this ? 回答1: You should use the Accelerometer. The idea is the following, in a static camera, the only force (which is seen by the accelerometer) acting on the camera is gravity. This should be able to give

问题 I'm trying to make 3-dof controller using Android phone, similar to Wiimote. Uses Accelerometer for recognizing the controller's orientation (used getOrientation() method for calculation) I'm testing the orientation values by using those values to rotate the cube drawn by opengl in PC. The problem is, it doesn't seem working. If the phone is rotated over the specific rotation, the cube is rotated to some weird direction. Without knowledge of computer graphics, I found the reference saying

问题 I'm seeing some unexpected readings from the userAcceleration field in CMDeviceMotion. When I look at the raw accelerometer data from CMAccelerometerData, I see that if the iPhone is flat on a table the reading is 1G straight down (1G in -Z axis) and if I drop the iphone (on a soft surface of course) then the acceleromtere reading goes to zero as expected. That's all fine. When I instead use the CMDeviceMotion class, the userAcceleration reading is zero as expected when the iPhone is flat on

问题 Is it possible to use the accelerometer to detect height? For instance, if I'm holding the phone on my hand and then detect the height after raising my arm? Thanks 回答1: Assuming you mean you want to detect the height the phone was raised from its staring point, yes. The android accelerometer measures force, more info on how to use it can be found here. Keep in mind that the accelerometer isn't a perfect device, and so your results will be approximations of how much the phone was really moved.

问题 I want to find out the pitch, yaw, and roll on an iPad 1. Since there is no deviceMotion facility, can I get this data from the accelerometer? I assume that I can use the vector that it returns to compare against a reference vector i.e. gravity. Does iOS detect when the device is still and then take that as the gravity vector? Or do I have to do that? Thanks. 回答1: It's definitely possible to calculate the Pitch and Roll from accelerometer data, but Yaw requires more information (gyroscope for