accelerometer accuracy

iOS New Accelerometer Event"iOS New Accelerometer event "1, iOS5.0 before, you can use Uiacceleration to monitor the accelerometer event.2, after the Bug iOS5.0, Uiaccelerometerdelegate has been depreacated, as follows:　　Deprecated is not to say, but it means that in the future version will be deleted, so if you do not want to update knowledge, use Uiacceleromete

Cocos2d-x event distribution mechanism-accelerometer event monitoring, cocos2d-x Accelerometer Event monitoring mechanism In the previous article introduced the cocos2d-x touch event mechanism, this to introduce the next game is also often used in the accelerator events, these are the game is often used. An important input source on a mobile device is the device direction. Most devices are equipped with an

This article is from: http://ucdchina.com/snap/9797,thank you! In June 8 last year, the Great Apple company released the latest iPhone 4G, which has many hardware upgrades. For gamers, the largest "Three-Axis Gyroscope "! The first time I heard that this "Three-Axis Gyroscope" was a time ago, I occasionally found that Apple players were testing the positioning function of the iPod Touch. For details, see "location offset problem of different mobile devices ".It seems very novel-Because iPod touc

) can be calculated with accelerometers and magnetometers, and the orientation involves three concepts:Roll: Tilt angle, also called Roller corner http://baike.baidu.com/view/1769672.htmPitch: Tilt back and forth, also called pitch angle http://baike.baidu.com/view/3832041.htmYaw: Sway around, also called yaw angle http://baike.baidu.com/view/1769448.htmThe code below is the source of/development/samples/compass in Android2.3, demonstrating how to use accelerometers and magnetometers to determin

yu Code Comments Machine learning (ML), Natural language Processing (NLP), Information Retrieval (IR) and other fields, evaluation (Evaluation) is a necessary work, and its evaluation indicators tend to have the following points: accuracy (accuracy), accuracy (Precision), Recall (Recall) and F1-measure. (Note: In contrast, the IR ground truth is often a Ordered

Source Address: http://www.geek-workshop.com/thread-1695-1-1.htmlThis post is translated from the IMU (accelerometer and Gyroscope devices) guide used in embedded applications.This article mainly introduces the mathematical models and basic algorithms of accelerometers and gyroscopes, and how to fuse the two, focusing on the discussion of algorithms and ideas.IntroductionThe purpose of this guide is to introduce inertial MEMS sensors, especially accel

This paper introduces the characteristic principle and application scenario of the-LIS3DH accelerometer sensor for wearable devices. ST's LIS3DH is widely used in smart wearable products such as smart hand loops and smart step shoes.LIS3DH has two ways of working, one of which is that it has built-in algorithms to handle common scenarios such as standstill detection, motion detection, screen flipping, weightlessness, position recognition, click and do

Tags: trait is Ted systems axes osc eset Android noteOperating system: Windows8.1 Graphics: Nivida gtx965m Development tools: Android Studio 3.0.0 | Cardboard 1.0 Before discussing the implementation in depth, it is necessary to understand the relationship between the IMU sensor and the coordinate system of the Android system and the relationship transformation, so that the coordinate system can not be mixed in the implementation and application. In this loan opportunity to translate Nvdia an

First, the conceptAccelerometer: Measures the acceleration in three directions of the x, Y, Z axis by sensing the total amount of inertial forces in a particular direction.Gyroscope: Measures the value of rotation around the x, Y, and z three directions. Feature: If you keep your phone flat while rotating it, the accelerometer value will not change, at which point the rotation value around the z axis is changed. Rotating the device clockwise generates

-pass filter can be used, for the control of the speed loop, this precision is enough to use, if you want to improve the accuracy of the calculation, to further improve the image part of the algorithm, the current image algorithm, or there will be lost the target of the situation occurs, further upgrade, the effect should be better In addition, now a lot of optical flow modules (mostly plagiarized Pixflow) can also be combined with the

Because the data acquisition station is basically installed in the field or the roof, the installation location and vibration have certain influence on the accuracy of the test data. So want to have a position state data, just found Kylin made on the ADXL345, such a digital output acceleration sensor. As shown in the red box:1 , ADXL345 OverviewADXL345 is a 3-axis, digital output accelerometer based on Imem

Coremotion is a framework dedicated to motion, which contains two parts of accelerometers and gyroscopes, before iOS4 the accelerometer is the Uiaccelerometer class responsible for collecting data, Now generally use coremotion to deal with the acceleration process, but because Uiaccelerometer is relatively simple, the same people are used. Accelerometer is determined by three axes, the user's most common op

ObjectiveBefore someone made a mobile phone anti-theft app through the iphone's accelerometer, and it was through this anti-theft app to get Angel investment. From then on gorgeous turn, the company develops the vivid. Although this project is not very good at the end, but it is really a nice idea.Maybe you don't know, every iphone has an accelerometer built in. This allows the built-in

Final:Cocos2d-x, the inheritance structure of layer layers:As you can see from the image above:several direct sub-categories of emphasis are: Control, ScrollView, Menu, Layercolorwhere Layercolor can make a layer color the subclass of control, which is all the classes that interact with the user, such as: button, slider, etc.0. Cclayer OverviewA game can have a lot of scenes, each scene may contain more than one layer,The layers here are generally cclayer objects. The cclayer itself has almost n

of the tool class are called in the activity's Onresume and OnPause methods: * Mshakeutils.onresume (); * Mshakeutils.onpause (); * */public class Shakeutils implements Sensoreventlistener {public shakeutils (context context) {Msensormanager = (sensorm Anager) Context.getsystemservice (Context.sensor_service); }public void Setonshakelistener (Onshakelistener onshakelistener) {monshakelistener = Onshakelistener;} public void Onresume () {Msensormanager.registerlistener (this, msensormanager.get

(); mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL); } protected void onPause() { super.onPause(); mSensorManager.unregisterListener(this); } public void onAccuracyChanged(Sensor sensor, int accuracy) { } public void onSensorChanged(SensorEvent event) { } } After different sensors are extracted from commonalities, everything becomes so simple as defined by the

Acceleration SensorThe acceleration sensor of the mobile phone is calculated by the offset of the x, Y, z three axes.The basic API in code is mainly focused on the Accelerometer typeThe main thing is to use this type of object to capture readingchanged events to monitor the change in acceleration values.X, Y, Z acceleration sensing values1 StackPanel>2 TextBoxx:name= "Txtx"Header= "X:"/>3 TextBoxx:name= "Txty"Header= "Y:"/>4

(event_onaccelerate);Msensormanager= (Sensormanager) mcontext.getsystemservice (Context.sensor_service);Msensor= Msensormanager.getdefaultsensor (Sensor.type_accelerometer); Msensorlistener = newSensoreventlistener() {@Override public void onaccuracychanged (sensor sensor, int. accuracy) {} @Override public voidonsensorchanged(Sensorevent event) {if (Event.sensor.getType ()! = Sensor.type_accelerometer) return; Long curtime = System.currenttimemillis

Http://www.cnblogs.com/fengfenggirl/p/classification_evaluate.htmlFirst, IntroductionThere are many classification algorithms, and different classification algorithms use many different variants. Different classification algorithms have different specific, different data sets on the performance of different, we need to choose according to the specific task of the algorithm, how to choose the classification, how to evaluate a classification algorithm, the previous decision tree Introduction, we m

example a delegate to the accelerator, the program example for declaring an example is as follows: UIAccelerometer *accelerometer = [UIAccelerometer sharedAccelerometer]; You can set the update rate of the instance. You can use the following program to set the update rate, which indicates that the update is performed once every 30 seconds. accelerometer.delegate = self;accelerometer.updateInterval = 1.0f / 30.0f ; After setting the delegate, you m