A sensor to measure acceleration.

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1answer
43 views

What's the best method of measuring displacement and speed without resorting to GPS?

Is it possible to determine the displacement, speed and acceleration of someone while running, by using methods like dead reckoning, sensor fusion or other, and sensors like accelerometers, ...
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0answers
11 views

DMP of IMU3000 combo Board [on hold]

I want to use IMU3000 and ADXL345 Fusion Board with Digital Motion Processor(DMP) for inertial navigation of my robot. Gyro and accelero is ok. but the main problem is that their is very little, vague ...
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2answers
49 views

How to determine minimal detectable acceleration on accelerometer?

How can it be determined the minimal detectable acceleration on analog and digital accelerometers? In datasheets I found only specification like sensitivity, noise etc. And how the minimal time for ...
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0answers
18 views

MPU6050 registers sometimes reading as 0x00

I'm doing some tests with a MPU6050 accelerometer but sometimes the accelerometer and temperature registers return 0x00 (I have not tested the gyroscope registers). When this happens I still can read ...
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0answers
9 views

What should be the delay to be given for reading accelerometer [migrated]

I have five accelrometer sensors (MMA 7361) connected to the analog channels of Arduino Duemilanove. I am using the following code to read the data. (I am reading from only one axis from each sensor.) ...
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4answers
81 views

How can I sense if a cane is being held upright or fallen down?

I am trying to make a little wireless-connected gizmo to attach to my grandfather's walking cane. The idea is that when it senses the cane has fallen down, it would alert/call one of us so that we can ...
0
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1answer
33 views

Wiring three-axis accelerometer

I need to wire the following three-axis axis accelerometer: http://docs-europe.electrocomponents.com/webdocs/127c/0900766b8127c68c.pdf Here when I click on ADXL335, the below link comes with some ...
0
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1answer
66 views

Using adafruit Flora or Adafruit Trinket + MPU-6050 3-Axis Gyroscope + nRF24L01+ together

I am trying to do a project where I need to transmit data from an object if the object is moved in a particular way. The restriction is that the device has to be as thin and small as possible. I am ...
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2answers
53 views

Normalization of Accelerometer Data

I have two different boards, one from TI and one from ST Microelectronics. Both these boards have one accelerometer of different brand. These two accelerometer sensors have different sensitivity. I ...
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0answers
79 views

Calculating angle using MPU6050

I'm using the code from the question Calculating Angles from MPU6050 for my project I'm using a MPU6050, GY-521 and an Arduino Mega 2560 with connections as follows: ...
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2answers
108 views

How do I find source of vibration from a mechanical source outside of my home

My problem is vibration from a mechanical source outside of my home. I think I have found the source (machinery at a legal marijuana grow op) and need to prove it to get an injunction at court. I ...
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0answers
57 views

LSM9DS0's Accelerometer not reading correctly

I have a LSM9DS0 Gyroscope/Accelerometer/Magnetometer breakout board. I am using an Arduino Uno which operates on 5V. The LSM9DS0 is communicating to the Uno using I2C through a Logic Level Converter. ...
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2answers
75 views

Angular Acceleration: Understanding the differences between Gyroscopes and Accelerometers

I apologize for what is likely an ignorant question, but I am fairly new to electronics and have little confidence. I am working on a personal project where I am using a servo motor to move a rod back ...
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0answers
209 views

Calculating Angles from MPU6050

I've been playing with a GY521 breakout recently with the MPU6050 chip on it, though i've hit a bit of a problem that I can't quite work out I know when I rotated the board I rotated ~90 degrees ...
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1answer
48 views

Choosing sampling rate according to the bandwith reponse in accelerometer datasheet

In an accelerometer's datasheet, the bandwidth response in the x and y axis is 350 Hz. There is another information related to the internal sampling rate (shown below). I don't know how these two ...
0
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1answer
39 views

Temperature compensation accelerometer and cross axis sensitivity calibration

I'm trying to compensate a 3-axis MEMS accelerometer for temperature. I can access a climate chamber where the device can be rotated in ONE axis. There is another place where I can rotate two axis, ...
0
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0answers
31 views

MEMS Accelerometer/Gyro 3-axis Conversion question

I'm not too familiar with the digital mems signal to analog conversion using a microcontroller. Can you still retain the signal intensity due to rotation of the gyro, or is the output always going to ...
0
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1answer
51 views

Whats the difference between these three breakout boards for the ADXL345 Accelerometer?

I would like to use the ADXL345 in a schematic im working on right now, but as there is no typical/minimal circuit provided within the datasheet i got stuck. I did a bit of research and found three ...
0
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1answer
93 views

Arduino standalone with 9V battery and accelerometer

I'm using an Arduino Mega for a project involving an accelerometer. Everything works fine when the board is connected via USB. When I use a 9V battery plugged in with the 2.1mm jack, values are ...
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0answers
38 views

How to Segment Accelerometer Signal at idle points

I'm using an 3 axis Accelerometer(GY-521) to get the acceleration data and also the gyroscope to get the gyro data. I want to segment the signals at the idle points so that i can get the segmented ...
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0answers
61 views

Detecting impacts using an accelerometer

I am using the LIS3DSH sensor from ST Microelectronics to detect accidents. For this I need to detect the impact using the variation of the G value, from a sudden shift of 1G to around 16G and also ...
1
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1answer
130 views

Need 3-axis wireless gyroscope/accelerometer.

So I would like to have a sensor that can detect rotation (around the vertical axis only is needed) and that detects motion (no specific direction, only be able to detect if the sensor is moving). I ...
0
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1answer
63 views

Is accelerometer taking as much power (current) as it needs? [closed]

I want to connect accelerometer to an oscilloscope. I have 3x AA rechargable batteries (2550mAh). I was told that e.g. microcontroller knows how much amps should it take and it wont burn if I ...
11
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3answers
639 views

Limits of dead reckoning using MEMS sensors

I'm trying to track body parts relative to a person's torso. I see quite a few questions about using MEMS accelerometers and gyros for dead reckoning, and they confirm my suspicions that various ...
0
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1answer
83 views

Is it possible to measure acceleration in sports activities with an accelerometer

I've been trying to make a simple prototype capable of measuring a punch or a shot put throw with an accelerometer, but suddenly stopped working, and "locked" into a value, has I was testing it. When ...
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1answer
149 views

I2C protocol debugging using oscilloscope

We are testing an I2C accelerometer connected to the ATMega32A micro-controller. The accelerometer was working fine. We can write and read the registers using I2C protocol. When connected to the ...
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0answers
76 views

LSM303DLHC data ready interrupt

I have a STM32F3-discovery board, and I have set up a little test. It just captures ALL input on GPIO3 and count them by channel. Then every seconds, I have a breakpoint with which I look at the ...
0
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1answer
83 views

Calculating mV/g of a sensor

I have constructed a piezo-resistive sensor using graphite. I managed to obtain the output voltage of 0-5V by using the ADC of my Arduino to read the sensor. But I have no idea how to calculate its ...
0
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1answer
97 views

What are the limitations of IMU sensor devices?

The Oculus Rift DK2 virtual reality headset uses an IR camera in conjunction with built-in accelerometer/gyro/magnetometer for accurate head/motion tracking. The previous version (DK1) used only an ...
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0answers
100 views

SPI always returns null while reading

We need some help in SPI protocol. We've been using an AVR microcontroller ATMega324PA (DIP) and an ADXL344 accelerometer (QFN Breakout). Both chip operates at 1.8V and supports I2C & SPI. Lately ...
0
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1answer
44 views

Cannot get the “Output Axis” to work

I have a Virtuabotix MMA7361 Three Axis Accelerometer Module that I am trying to use to detect tilt. It works, but only for two axes at a time. It doesn't matter which way I try to flip or turn the ...
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2answers
118 views

converting mV to g

I have recently run a vibration test at work using a PCB piezotronics model 482C sensor signal conditioner. How do you convert the the MAX reading (in mV) into the equivalent acceleration (in g). The ...
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0answers
72 views

I2C slave is not acknowledging for SLA+W but values can be read from/write to registers

We got a wierd problem in a I2C device. We've been trying to solve the issue for more than a week now. This post is about ADXL344 Digital Accelerometer from Analog devices. We made three prototype ...
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0answers
76 views

Accelerometer (or something else) to detect rotary oscillations

I'd like to detect oscillations of a rotating disk. If an heavy weight object is placed in the wrong way on the rotating disk, the rotation it's not anymore only on a straight plane (perpendicular ...
2
votes
1answer
120 views

Detecting foot steps

I'm building an interactive disco dance floor. Like the light up dance floors from the 70's, but each floor panel should be able to detect when it's being stepped on and possibly light up to show ...
1
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0answers
54 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. ...
0
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1answer
156 views

Regarding Direction calculation using Gyroscope,Magnetometer and Accelerometer

We are using a MEMS tri-axial sensor which has an Accelerometer,Magnetometer and Gyrometer. We have also calibrated the Accelerometer and Magnetometer.This sensor package is used in a borehole ...
1
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2answers
82 views

Most energy efficient way to detect motion

I am hacking together a prototype wrist band, with BLE as the main component. I'd like the device to detect a bump or a wave. What would be the most energy efficient way to do so? I'd like the ...
0
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0answers
79 views

Triple Axis Accelerometer Breakout - ADXL335 synchronise

I have three ADXL335 Triple Axis Accelerometer Breakout boards. I wish to measure the the acceleration of a human leg as it walks at three points (hip knee and ankle). I want this to log this data in ...
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0answers
76 views

9 DoF Sensor Accelerometer Readings Inconsistent

I have the following sensor stick: https://www.sparkfun.com/products/10724 It has an accelerometer, gyroscope, and magnetometer. I have connected it to an arduino and am reading the accelerometer ...
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0answers
46 views

Is there an influence of accelaration on the gyroscope data

I want to create an application that measures the horizontal position of the device while accelerating (positive and negative). My biggest concern is that the gyroscope data will be influenced by the ...
0
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1answer
102 views

MMA8453 accelerometer I2C problem

I ran into an issue with my project. I use Renesas RL78 microcontroller and on one I2C bus I have two sensors: digital compass and accelerometer. Accelerometer type is MMA8453 by Freescale. ...
3
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1answer
188 views

Gyro vs accelerometer for rotational acceleration

For the same price chip, which will be more accurate to measure rotational acceleration: a gyroscope, or an accelerometer 10cm away from the pivot point?
0
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1answer
214 views

ADXL 335, lack of resolution for short angle inclination?

I am currently working on a project where I would like to measure X/Y inclinations changes, without worrying too much about the acceleration. I decided to use ADXL335 accelerometers in order to ...
2
votes
1answer
211 views

Measuring speed with 3axis accelerometer

We are creating a ball that changes colour depending on its speed when it rolls. I have a 3 axis accelerometer sensor. This is the code we are using at the moment: ...
7
votes
1answer
850 views

AHRS algorithm under continuous linear accelerations

I have tried several algorithms to get pitch, roll and yaw under continuous linear accelerations and vibrations (smaller than 0.4g, frequency lower than 10HZ). None of them give good results because ...
5
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4answers
2k views

Dead reckoning with accelerometer & gyro. Possible?

I have a 3 axis accelerometer and a 3 axis gyroscope. I've been tasked with developing a dead reckoning system using this hardware. Essentially what's needed is for me to develop some code to track ...
0
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1answer
103 views

Accelerometer acquisition, filtering and treatment on Pic

I've been asked to experiment with dynamic testing. Using accelerometer and strain gage bolted onto a metallic pipe,and hammering it ( the pipe ) I need to show out force of the impact, and ...
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2answers
295 views

MEMS Gyroscope BMI055 - random high spikes in data

I am using the BMI055 on my AVR through I2C. Datasheet: http://ae-bst.resource.bosch.com/media/products/dokumente/bmi055/BST-BMI055-DS000-06.pdf I set it to filtered output at an ODR of 1000Hz and ...
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0answers
126 views

Bosch BMI055 Accelerometer/Gyro causes I2C bus to crash when issuing a softreset!

Datasheet: http://ae-bst.resource.bosch.com/media/products/dokumente/bmi055/BST-BMI055-DS000-06.pdf I have recently integrated the Accelerometer of the BMI055 I added a soft reset of the chip at ...