Questions tagged [accelerometer]

A sensor to measure acceleration.

Filter by
Sorted by
Tagged with
0
votes
0answers
15 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 ...
0
votes
1answer
24 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 ...
0
votes
2answers
48 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 ...
0
votes
0answers
11 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 ...
0
votes
0answers
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. ...
0
votes
0answers
34 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 ...
2
votes
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 ...
0
votes
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 ...
0
votes
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. ...
0
votes
1answer
44 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. (...
0
votes
0answers
21 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?
0
votes
2answers
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 ...
0
votes
1answer
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 ...
0
votes
0answers
31 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 ...
0
votes
0answers
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 ...
0
votes
0answers
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 ?
0
votes
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 ...
0
votes
1answer
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 ...
0
votes
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. ...
0
votes
0answers
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 ...
0
votes
1answer
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,...
2
votes
0answers
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 ...
0
votes
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 ...
1
vote
0answers
62 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,...
0
votes
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 ...
2
votes
0answers
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 ...
3
votes
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 ...
2
votes
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 ...
0
votes
0answers
26 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 ...
0
votes
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) ...
1
vote
0answers
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, ...
0
votes
1answer
71 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 ...
5
votes
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. ...
1
vote
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 ...
0
votes
2answers
118 views

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) ...
0
votes
2answers
84 views

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?
0
votes
3answers
190 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/...
1
vote
2answers
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)...
0
votes
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 ...
1
vote
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 ...
0
votes
1answer
411 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 ...
1
vote
2answers
56 views

How is Gyro drift error related to error in velocity and position?

While reading about IMU on wikipedia I found this about its disadvantages: "A constant error in attitude rate (gyro) results in a quadratic error in velocity and a cubic error growth in position." ...
1
vote
2answers
25 views

MMA8452Q INT1/2 drive circuitry

I'm struggling to find any information on how the interrupt outputs on the MMA8452Q accelerometer are driven. I need to know whether they're open-drain or push-pull for example. I've poured through ...
0
votes
2answers
86 views

Can you make a seismograph with an accelerometer?

Actual seismograph electronics are very expensive. I'm just wondering if a seismograph can be made with a adequately semsitive accelerometer. To be exact I want to bury the accelerometer based ...
2
votes
1answer
198 views

Adafruit Feather (Arduino compatible) nRF52 SPI with ADXL345 issues

I’m experiencing some issue in trying to make ADXL345 accelerometer works in SPI by using an nRF52 feather. I'm using the ADXL345 SparkFun library read values from it. Here are the connections ...
0
votes
1answer
84 views

Invensense MPU9150 Accelerometer Raw Values Even

I've been working on pulling data from an MPU-9150 for a data filtering project, and I ran into a issue that I'm not sure of the cause. When I set the accelerometer to ±2g or ±4g range, all the raw ...
0
votes
1answer
239 views

Checking my mpu6050 schematic

I am fairly new to pcb design and I just created a mpu6050 chip that will work with an Arduino microprocessor. I want to make sure the hookup is all correct before I start work on the other parts, as ...
0
votes
2answers
126 views

What is the “dt” in the complementary filter equation and how do I find out the “dt”?

I am trying to implement a complementary filter in my system but I do not quite understand what "dt" means and how should I find out the "dt" in the complementary filter equation. I found the ...
0
votes
0answers
107 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 ...

1
2 3 4 5
8