Questions tagged [accelerometer]

A sensor to measure acceleration.

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166 views

OSError: [Errno 121] Remote I/O error or pigpio.error: 'I2C read failed' on MPU6050

So I use MPU6050 to get acceleration from stepper motor linear rail movement(steper motor working in thread, I use pigpio for the motor) by make the MPU6050 can work on threading and it can show data ...
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104 views

why gyroscope sample rate can be changed by frequency, while accelerometer sample rate cannot?

This is from the mpu6050 datasheet. In the datasheet, gyroscope sample rate can be changed by frequency, but accelerometer cannot. Why this happens?
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294 views

Using change in magnitude of accelerometer to calculate speed?

I have a wheel (say 60cm in diameter). And I am planning to attach a small board with an AVR and an accelerometer about 10-20cm from the centre. As the wheel spins, I will get acceleration outwards. ...
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How does “Tilt on Wrist Interrupt is detected with one accelerometer axis” work?

bma456 has a tilt-on-wrist detection interrupt. When ever the device is rotated more than a minimum of 12 degrees to gravity, an interrupt interrupt is generated. In the data sheet, it says "The Tilt ...
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4answers
274 views

Which is give better result for find angular position of device using 9-axis IMU snesor.?

I'm Using LSM9DSO 9 axis Sensor Which gives output of Accelerometer , gyroscope , Magnetometer Output data. i want to find the angular position of the device using this sensor. currently i'm trying ...
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76 views

Acceleration in the Z direction in Earth frame regardless of orientation

I have acceleration readings on 3 axes from an accelerometer, I'm trying to find a way to get the acceleration in the vertical direction independent of the current orientation of the sensor. I have ...
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2answers
400 views

STM32F722ZE SPI communication with LSM6DS33 using HAL

For a long time I can not read the correct data from the LSM6DS33 control register (accelerometer + gyroscope). As I read in the datasheet, the control register address WHO_I_AM is 0x0f. In order to ...
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1answer
5k views

Simulating accelerometer in proteus

I am not able to find any libraries for simulating accelerometer in proteus. Is there such a library? If NO, how do i simulate an embedded system that has an accelerometer? Thanks
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4k views

Why am I seeing drift when using Madgwick algorithm to correct for orientation with 9 DOF IMU?

I am trying to correctly track orientation of a sensor with accelerometer, gyroscope, and magnometer, using the open source Madgwick algorithm. The algorithm returns quaternions which represent the ...
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1answer
144 views

LIS2DH12 Watermark and Overflow Interrupts at the same time

I'm working on a project that uses the LIS2DH12 accelerometer by ST (product page). I have a couple of questions about it, and as it is quite a common part, I wonder if anyone here knows the answers: ...
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42 views

Understanding the SIGNAL_PATH_RESET register

I'm trying to understand the signal path reset register in the ICM-20608-G IMU. In what condition would I ever want to reset the signal path? What is actually being reset? Is this intended to clear ...
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IMU Power Modes

The invensense ICM-20608-G power modes in the datasheet are well enumerated, but it is unclear how to enter those modes. There does not seem to be a direct value that can be written to a single ...
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75 views

Servo accelerometer dual power rail requirement

Why does this type of accelerometer need split supply. In the data-sheet this is described as a excitation voltage. But the diagram they provide does not show any +/- rails or any excitation ...
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3k views

Measuring accelerometer frequency with an oscilloscope

I've got a VTI CMA3000-D01 digital accelerometer and I'm controlling it via SPI from a Texas Instruments CC2540 chip using the embedded 8051 MCU. In the datasheet for the CMA3000, it mentions that ...
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1answer
330 views

Transient drop in accelerometer gravity reading when in motion

I am using Pololu AltIMU-10 v4's accelerometer to monitor the acceleration of my system. I understand that when the sensor is placed upright on the table, it should measure 1g in the +ve z-axis. ...
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1k views

Interrupt and FIFO settings in LSM6DS3

Requirement: Need to use only accelerometer in LSM6DS3 at 104 Hz in 2g full-scale mode and FIFO in Continuous mode. Interrupt should be generated every 320 msec. Understanding: For every 1 sec there ...
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2answers
72 views

How to calibrate Accelerometer sensor physically?

I am having a development kit DK20948 that is a 9 axis IMU sensor on it. and to use it I am using SmartMotion eMD Page number 47, when using the CLI tool, I am getting data of the sensors and an ...
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ADXL343 data read

I am using a ADXL343 accelerometer in one of my designs and I am getting strange readings from the device. Just to be sure, I would like to confirm that I am formatting the data properly. (I get the ...
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1answer
346 views

How to speed up charging of output capacitors of ADXL335?

Problem statement I need to obtain as fast as possible after power-up a reading from an accelerometer. The accelerometer is located in a car and is powered by the same rail of the rear braking lights,...
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1answer
1k views

IMU axis rotation, calculate values with respect to Earth plane

I'm building a project that uses an IMU (Inertial Measurement Unit). The project involves the device to be mounted inside a vehicle and I should provide the ...
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2answers
225 views

how reliable are IMUs for a long usage (6 hours) rotation (only) tracking? [closed]

I know they are bad for positional tracking and drift from actual position over time but would like to know what is the situation with rotation only. I know Oculus DK1 used ordinary off the shelf ...
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3answers
76 views

How to measure tilt on a dynamic device?

I'm trying to instrument a vehicle component. I want to measure a component's angle during a drive cycle. The component has a single degree of freedom, it has a fixed axis. I'm trying to figure out ...
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2answers
57 views

Confusion about the meaning a parameter

Below is a part from this accelerometer: For +/-2g the Scale factor tolerance is given as 10mg. There is also 0.25%. This is in parentheses as 1.25(0.25%) V/g. Is 10mg derived from 1.25(0.25%) V/g? ...
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132 views

Accelerometer MMA8451 issue

We at my company, has a very strange issue regarding til MMA8451. We are experincing that our accelerometers data can be suddenly wrong over time. We have approximately 250 devices out, running in ...
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1answer
11k views

Rotating a gyroscope's output values into an earth-relative reference frame

For whatever reason, I seem to have gotten myself twisted into quite a confusion on how to process data from my 3 axis gyro and 3 axis accelerometer to get gyro rotation values related to the earth's ...
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2answers
134 views

3 axis accelerometer for detection of cutting a fence [closed]

I am currently working on a project and would appreciate your help. So i have this fence (eg. 3m x 3m) on which my 3 axis accelerometer is mounted in the geometrical center. It can detect whether ...
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4answers
513 views

Speed calculation using Accelerometer

I am using ST manufacture Accelerometer(LIS2DE12) and i making a small hobbyist project for me. For this I am using ST-Microcontroller and developing the C code i am using KEIL V5 IDE. Configured the ...
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1answer
517 views

Cannot read accelerometer values from MPU6050 Interfaced with STM32F303RE

I m working on a "self-balancing robot" with STM32F303RE.I m using STCubeMX to generate the MCU configuration code and then I added the main() to get the values from MPU6050 from the following code : ...
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1answer
38 views

Accelerometer first-order Markov chain model

I am trying to implement the algorithm for altitude estimation presented here. In the beginning of section 2.1 the authors present the mathematical model they will be using for the accelerometer. The ...
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62 views

Failure accessing ST LIS3DSH accelerometer CTRL_REG_4

I'm writing to ask if someone has ever encountered a quite weird behaviour of LIS3DSH. to properly use such sensor, a number of registers must be configured via the spi bus. I implemented a routine ...
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2answers
100 views

can an acceleration sensor (smartphone) sense if someone is sitting in a train or just sitting normally?

can an acceleration sensor (smartphone) sense if someone is sitting on a train (or commuting in a car for example) or just sitting stationary? This may be a really basic question but thanks for your ...
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58 views

Using my sensor values, what are relevant data analysis techniques?

I am currently trying to devise a system using gyroscope+accelerometers placed in on a hat/cap in certain areas of the head (Front-left, Front-right, Centre, Back-left, Back-right). I want to create a ...
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1answer
1k views

Balancing quadcopter using mpu6050 [closed]

I am on a project which nearly completed. But what remains is balancing. My project is making a quadcopter. All the programing and hardware stuff is completed. But when i fly it, it doesnt goes up, it ...
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3answers
7k views

Small Wireless Gyroscope & Accelerometer

I'm looking to assemble a very small circuit to transmit data from a gyroscope and/or accelerometer to a computer via wi-fi. It also needs to be self-contained (so should contain a power source). The ...
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1answer
1k views

MPU6050 showing inconsistent angle values

I'm using this Arduino code to calibrate and read from an MPU6050 accel/gyro sensor from an Arduino Mega. The calibration and reading of values seemed to go well. However, I'm seeing some ...
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1answer
87 views

Are there any “Translation Accelerometer”?

I find many "Rotation Accelerometer" such as "GY-85", "GY-521", but no one for Translation. Are there any "Translation Accelerometer", can detect the XYZ axis movement?
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1answer
239 views

LSM6DS33 how to filter accelerometer values even more (< 50Hz)

I'm trying to use a LSM6DS33 6-axis accelerometer/gyro chip as an inertial navigation aid, participating in sensor fusion. The problem is that the application has large amount of vibrations and the ...
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94 views

Measuring pitch under dynamic acceleration: better to use 6DOF sensor or 9DOF?

I am working on a project that is challenging me. I've researched on the subject as best I can, but would like additional opinions. I have a 4' long aluminum c-channel (essentially, a metal rod) with ...
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3answers
148 views

Radiation Effects on Electronics

I'm developing a magnetic field sensing kit for a project. The kit contains sensors (specifically an accelerometer, a gyroscope, and a magnetometer) that will detect and measure magnetic fields, and ...
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3answers
159 views

How to detect the Accelerometer is moving

I am using the MCU intergrade 3-axis accelerometer and set it on the bicycle. I want to detect the bicycle is moving or stop. But the vibration noise let my function failed. Is anyone could share ...
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2answers
100 views

Optimal sensor for measuring object velocity in an open area?

I am trying to measure vertical and horizontal speed of an object attached to a parachute. It will be launched from a low altitude and in an open area, allowing satellite GPS lock. Data treatment ...
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2answers
21k views

How Precise can I get with Accelerometer and Gyroscope

I want to build a little project to track an objects position in space. For this I intend to use an accelerometer and a gyroscope. The problem is I want this tracking to be very precise, and I haven'...
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2answers
231 views

Tracking movement of limbs for smartphone app

I'm looking at building a smartphone app that will need to track the users limbs (say legs/feet) as accurately as possible. The goal is to trace the moments of body parts and the timing of the ...
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1answer
309 views

Realistic Magnetometer Specifications [closed]

I'm working on making improvements to an old project I helped design. The project used an Arduino to take measurements from six sensors to measure the strength of a nearby electromagnet that generated ...
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2answers
892 views

Converting Acceleration of ADXL335 data into displacement

I'm currently using a ADXL335 chip two measure acceleration then converting it into a displacement. I'm wanting to measure the vetical (-z direction) displacement range of maximum 10cm, so quite small....
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7answers
3k views

Acceleration when device is on tilt

I'm currently working on device that uses always-on 3D accelerometer(using scale +-2g) and 3D gyroscope(using scale +-250g) -sensor. I can read every possible vector (X,Y,Z) and their acceleration (g'...
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1answer
95 views

Measuring High Speed Angular Velocity 20,000+ rps

I'm looking for a way of measuring angular velocity in a spinning object at high speeds - up to 25,000 degrees per second. There's ridiculously expensive gyros in the market that can do this, but I'm ...
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3answers
524 views

LIS3DH- Understanding Z axis output

I am trying to measure a machine's vibration using LIS3DH sensor. I set the LIS3DH in low power mode and 5.376 kHz sampling frequency which outputs 8 bit output. I use SPI to get the data from the ...
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1answer
637 views

Measure vertical distance travelled

I wonder if it's usually practical to use an accelerometer to measure the height of a ball tossed in the air. That is, would it be accurate to integrate the acceleration measured over time twice? An ...
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1answer
111 views

Accelerometer readings

I'm using an Endevco Model 2220D Accelerometer with an Endevco Model 2721B Charge Amplifier to get vibration readings from a motor. I was asked to get a reading in IPS (Inches per second) but the ...