Questions tagged [accelerometer]

A sensor to measure acceleration.

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23 views

Clarifications about GY-521 Module (Accelerometer and Gyroscope) for Arduino

I have some doubts about how to analyze data acquired through a gyroscope and accelerometer (GY 521, datasheet). Precisely, let's consider this acquisition I have done when the module was still: My ...
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46 views

Transfer function of a second order capacitive accelerometer

In order to find the transfer function of the accelerometer MMA7361L based on the information given in the data sheet 1 I first made a hypothesis that it a second order sensor since it has a ...
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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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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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1answer
46 views

Reduce signal noise detected by accelerometer due to interference from a motor (caused by reverse neutral current)

EDIT AND IMPROVED QUESTION: After working at it, I figured that the problem was that my DAQ is reading the current that flows back into the DAQ through the neutral wire. My DAQ is powered with DC ...
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147 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 ...
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1answer
805 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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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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1answer
139 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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1answer
55 views

Unified struct in C to represent multiple sensor data

Working on desginging APIs for sensor events. I was wondering if there is a way to represent different type of sensor readings into a unified struct in C ? For example a accelerometer'e reading ...
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261 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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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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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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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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104 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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66 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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26 views

How do I interpret the zero-g level change vs temperature specification for this accelerometer?

This is an extract from the datasheet of the MPU6050 sensor. I was expecting the level change vs temperature to be in units of mg/oC. Instead, as you can see, the temperature range is specified ...
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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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1answer
154 views

Cable for MEMS Accelerometer

I am using a MEMS Accelerometer (ADXL1001), along with the EVAL board and an NI 9234 DAQ module to acquire the signal. I am using a RG58 coaxial cable to connect the sensor output (2 connector pins, ...
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1answer
159 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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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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1answer
283 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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241 views

Suggestions for accelerometer signal conditioning

I want to use an adxl326 accelerometer to measure vibration in one plane only. The accel is fed 3.3V and returns 1.65V at 0G's +/- 57mV/G What I want to do is remove the 1.65 bias to get an ac signal ...
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206 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 ...
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12 views

Functioning Problem In Accelerometer

Hello I have used ADXL335 Accelerometer in a gesture controlled project but I have powerd by 5v output from Arduino Lilypad, so it started creating mess by giving wrong outputs. Afterward I came to ...
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1answer
72 views

Slow FIFO read from LSM6DS3

I have been trying to read FIFO buffer from LSM6DS3 inertial sensor via i2c. The processor will read LSM6DS3 buffer every 20s so the FIFO will contain approximately 3120 bytes of accelerometer data. ...
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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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1answer
408 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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32 views

piezo element vs accelerometer

I'm looking at options to detect forces applied to a car door. An accelerometer seems by far like the most popular option, but I was also considering placing several piezo elements inside the car door,...
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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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91 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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1answer
24 views

Degrees of freedom concept in sensors

I was examining the specs of a breakout board. It says in there that, Integrate 10 dof sensors Adxl345 accelerometer ITG3200 gyro HMC5883L Compass BMP280 pressure sensor Why ...
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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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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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191 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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1answer
97 views

Accelerometer Drift?

I'm using an ST Microelectronics LIS3DSH accelerometer to detect tilt over an extended period of time. I have the accelerometer securely mounted to a stationary object away from any vibration. Over ...
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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 ...
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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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1answer
142 views

Is it possible to use an accelerometer as a route finder? [closed]

I have an ESP8266 and an accelerometer (MPU6050.) When I place the accelerometer with ESP8266 in my gadget, is it capable sensor to draw the path of gadget travel (means to get the co-ordinates) ...
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58 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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1answer
70 views

Problem in Z-Axis motion acceleration with MPU6050

I extracted motion acceleration with MPU6050 and removed gravity. Now, the problem is when I put the sensor in no-move status, I read nearly zero acceleration in z-axis but when I turn it 180 degree ...
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1answer
164 views

Spikes in raw acceleration data from AC motor

I have an MCU with an accelerometer, tightly mounted onto an AC motor inside a production hall. Once an hour, it collects 1 sec. (Sample rate is 5000) of acceleration data for the motor and saves it. ...
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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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Why SS and MISO of sensor is permanently high?

I have a brand new acceleration/giro sensor evaluation board which I want to interface with ESP32 via SPI bus. After spending few days trying to make it work, I have discovered that sensors SS(CSB) ...
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How can you estimate the final position of a gyroscope graphically?

A Smartphone is initially in the position indicated as follow We move it, and get the next gyro reading. How can you estimate your final position graphically?
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188 views

How does an accelerometer interpret g as ( +9.8 or -9.8 )

I am working with MPU6050 (accelerometer + gyroscope). Concerning about the accelerometer; Do these sensors(accelerometers in general) uses g as 9.8 m/s^2 or - 9.8 m/s^2 ? (Is there a standard/...
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250 views

What is the meaning of output of an accelerometer

I know this question is not fully related to aviation, but I assume the people on this subsection will also have some idea. Suppose I have an accelerometer resting on a table(flat surface, horizontal)...
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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 ...

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