Questions tagged [accelerometer]

A sensor to measure acceleration.

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70 views

Can I increase the maximum effective range of an accelerometer by rotating it?

I've been looking for an absolute orientation IMU (usually 9 axis, with accelerometer, gyroscope, and magnetometer) that can measure high g-loads in one direction (max ~20 g). However, the highest ...
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220 views

How to subtract gravity from raw acceleration of an MPU9250 - 9DOF IMU

I'm working with an MPU9250 and using the Madgwick Filter. For what I know I need to subtract the GRAVITY from my X, Y, Z Acceleration values, basically, some kind of gravity compensation to get ...
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0answers
77 views

Accelerometer to detect when product has been picked up by user

I have a 3-axis accelerometer on my board and i was hoping to use it to detect when a user lifts the device up. I would like to avoid false triggers when the table shakes or when the user nudges the ...
2
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1answer
219 views

Is it possible to wire an accelerometer straight to lights?

I am currently working on a personal project and was wondering if there was any way to wire an accelerometer to an LED light to illuminate the light when a set g-force is achieved. I am not too ...
2
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1answer
262 views

PIC16F1783 Inclinometer Project using Accelerometer 12-bit ADC issue

I am working on an inclinometer project using an accelerometer, MMA1220KEG and a PIC16F1783, it is designed to switch a relay when the angle of inclination is below 15 degrees and illuminates a series ...
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0answers
822 views

LIS302DL Accelerometer WHO_AM_I command

I've setup the behaviour of LIS302DL accelerometer IC using following code: ...
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0answers
37 views

Understand an accelerometer data sheet correctly

I want to use an accelerometer to measure vibrations. Most important for me is the operating frequency range. Reading a sensor data sheet, section dynamic specifications, there is (mostly) nothing ...
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0answers
67 views

Huge spikes and sudden offset in accelerometer data (FRDM-K64F & ADXL357)

I'm working with vibration analysis on electric motors (AC). I have a mBed FRDM-K64F with a EVAL-ADXL357 connected to it - mounted onto a motor. The device samples from the FIFO 4000 times per second,...
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59 views

Ultra low power but also wake on event?

I have a nodemcu that needs to turn on periodically (every 2 hours) to take measurements, send them to me and then go back to sleep. I need this to be able to last for at least a year on batteries, ...
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0answers
68 views

How to set registers of accelerometer BMA220?

I first wrote my problem in Arduino Stack exchange (https://arduino.stackexchange.com/questions/68438/how-to-manage-interrupt-from-accelerometer-bma220) but I was told that I might get a better help ...
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3answers
51 views

How do piezoeletric accelerometer sensors generate output voltage?

How does piezoeletric accelerometer sensors work technically? I know that piezoeletric accelerometer sensors have a piezoeletric crystal, a mass and a spring. But where is the voltage at the ouput ...
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0answers
98 views

Quarternion disagreement between two BNO80 IMU

I'm trying to use two BNO80 orientation sensors to measure the deflection of a universal joint in both pitch and yaw (there are components in the way that prevent the use of rotary position sensors). ...
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1answer
305 views

Compensate centrifugal force in accelerometer measurements

I'm working on a project that includes counting the revolutions of a cylinder connected to an engine. This engine runs at a minimum of 5 revolution per second and a maximum of 9 revolution per second. ...
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0answers
175 views

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
823 views

Reading FIFO in LSM6DS3

What is the difference between reading the FIFO registers(FIFO_DATA_OUT_L,FIFO_DATA_OUT_H) and Sensor output registers(OUTX_L_XL to OUTZ_H_XL) both are same?which is recommended to get the raw data ...
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478 views

Should I be using a Standard Kalman Filter (KF) or an Extended Kalman Filter (EKF)?

So I am trying to implement a Kalman filter for an Inertial Measurement Unit (IMU) using an Arduino. I have 4 sensors: GPS Accelerometer Gyroscope Magnetometer To measure various vehicle properties ...
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0answers
654 views

Constant values read from LIS3DSH Accelerometer

I'm working with the board STM32F4DISCOVERY from ST microcontrollers. I'm trying to read acceleration on the 3 axes from the accelerometer LIS3DSH via I2C communication. The code is working on one ...
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0answers
257 views

3.3v output voltage on arduino mini

I'm learning to use the Adafruit LSM9DS0 and have cobbled this code together such that an LED will turn on when it detects motion on the accelerometer, specifically when the magnitude is over a ...
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0answers
231 views

Accelerometer - Offset correction

I'm using the MMA8453Q for motion detection. The accelerometer is mounted such a way that when it is stationary, X & Y axes are at 0g & Z-axis is at 1g. My usecase is: A tilt across any axes ...
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0answers
215 views

Is “transient detection” exclusive to Freescale?

I'd like to detect the dynamic component of acceleration, i.e. the change in acceleration, and generate an interrupt when such change is detected. I see that MMA8451/2/3 calls this "Transient ...
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200 views

MPU 6050 dspic33fj128gp802 addition operator problem

I use dspic33fj128gp802 and MPU6050 for my project. Microcontroller succesfully takes the data from sensors 6 channel and sends the data pc via UART. When i want to add "float 2.0" or "int 2" to ...
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398 views

Data from BMA220 accelerometer

I am trying to make a device which can give x, y, z data and also can detect freefall and shock. For that I am using bma220 sensor. I am programming the sensor in 8g as I need shock values < 8g. ...
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1answer
162 views

How to estimate displacement error using accelerometer

I am using an MPU6050 and performing a double integration to obtain displacement, and this is to be placed in a vehicle that will be subject to about 2.5g. I cannot test it now, but how is it possible ...
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17 views

Accelerometer signal to audio signal

I have a accelerometer (ILS - MPU9250) and a woojer vest. The woojer vest is a device that shakes based on audio input. (simple line in with jack) What I would like to do, is to put this ...
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12 views

how can I simulate the MMA7361L?

I wanted to know if there is a simulator that could include the model of the capcitive accelerometer NXP MMA7361L, and if there is a tool-box in matlab that could include it or should I find the ...
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18 views

Vibration sensors, single axis or tri-axis, or maximal vibration from all axes

Most vibration sensors are either tri-axes or single-axis. Tri-axes sensor has 3 output representing vibrations on x,y and z directions. Single axis sensor only measures vibrations on one direction. ...
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0answers
35 views

Frequency response of accelerometer MMA7361L

In order to create the model of the MEMS accelerometer MMA7361L I'm going to need the frequency response of it, but I don't have access to the university lab to use the oscilloscope because of the ...
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0answers
41 views

What are the general guidelines to configure IMU sensor parameters?

Im working on developing a Attitude and heading reference system (AHRS) for my quadcopter project. Im working with AltIMU-10 v5, it is 10 DOF (gyroscope,Accelerometer,Compass,Altimeter) IMU board. ...
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1answer
45 views

Low pass filter vs integrator

Context: I am programming a flight controller for an autonomous drone. I want it to be able to hover in place so I am working on a PID controller for the throttle to keep vertical velocity at 0. (...
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22 views

Looking for the library of the accelerometer MMA7361L or an equivalent in Proteus

I want to draw the transfer function of the accelerometer that I am using, which is the MMA7361L, using Proteus. Can you please help me to find it or to find an equivalent?
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2answers
73 views

How to convert between G and mV/g of sensitivity?

I cannot for the life of me understand how mV/g or LSB/g can be related to the g sensitivity. For example, how can I find 0.0025 G sensitivity accelerometer given the sensitivity in mV/g? I haven't ...
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0answers
33 views

MPU 6050 accelerometer generating gaussian noise with strange gaps

I was using an GY-521 accelerometer/gyroscope module in order to provide inertial tracking. The GY-521 interfaces with an Arduino which sends data over a serial connection. I convert these values into ...
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34 views

Fusion algorthm: how many DoF for the gyroscope?

The gyro data output will be fed to an Extended Kalman Filter and fused with data output from an accelerometer. my goal is to measure tilt angle over one axis. Do I need a 3 DoF gyro or will a 1 DoF ...
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19 views

inclinometers signal bandwidth

the answer here suggests that inclinometers are low bandwidth devices by design. But how low is low ? Or what difference will there be between a 6.25 Hz signal bandwidth device and a 62.5 Hz one ?
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1answer
24 views

ESP8266 and I2C

I want to read data from five equal devices via I2C. Master is ESP8266 microcontroller and slaves are five MPU5060. The problem is that they have equal addresses. I've seen a lot of answers about how ...
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43 views

Accelerometer data values

I connected my device via serial cable to read the raw data logs. I moved the device to the left (assuming this is obviously the x- axis). However my data below has fluctuating values on the y and z ...
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0answers
47 views

How does a Ratchet Mount Digital Angle Gauge Work?

I would like to build a ratchet mount angle gauge for bolt tightening. I asume that what I have to do is measure yaw. I'm using a MPU9250 to do this but I have a lot of drift when I integrate the gyro ...
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0answers
27 views

What to look for in an Inertial Measurement Unit?

I'm trying to implement an inertial measurement unit (IMU) in a project of mine, but I don't have much experience in this field. There's some terminology that I don't understand. For example, what ...
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0answers
50 views

need help deciphering accel/gyro datasheet for i2c communication using python RPi

I have barely any knowledge in this area, the most I have done is used my RPi3 with pre-built python libraries for sensors such as ADS1115 so I didn't have to go through the process of understanding ...
0
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1answer
451 views

SPI Communication between ADXL345 and TM4C123GXL (TIVA C Launchpad) doesn't work as intended

I need to interface the TM4C123GH6PM based Microcontroller board TM4C123GXL (TIVA C Launchpad) with a accelerometer (ADXL345) by Adafruit. As, I am bound to use SPI communication and program on ...
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0answers
108 views

Can't use the Wake-on-Motion functionality of an MPU9250 with STM32

Hi there :) I'm trying to use the Wake-on-Motion functionality of this particular MEMS (MPU9250) with my STM32L152C-Discovery board: if the MPU9250 sense a motion, the INT pin will be high. To achieve ...
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1answer
144 views

No change in MPU6050 values when interfaced with PIC. Why?

I'm trying to interface mpu6050 module with pic16f886 microcontroller. But, i'm getting x-axis, y-axis and z-axis as 0. Why is there no change in readings even when i move my mpu? edit: This is the ...
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0answers
318 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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4answers
78 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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3answers
148 views

Automotive accelerometer calibration

I would like to design a device which measures acceleration, yaw, pitch and roll for motorsport/automotive application. I plan on using an analog accelerometer, to provide better bandwidth and low ...
0
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1answer
39 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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0answers
76 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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0answers
109 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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2answers
93 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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0answers
145 views

A question about sharing excitation supply for multiple sensors

Note: this question updated, please see the major edit. I need to wire four or two of accelerometer and perform data-acquisition with a single-ended daq device. It seems this is single ended output,...