A sensor to measure acceleration.

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What is the most precise position measuring system?

While developing position measuring system I faced the problem of precise data acquisition. There are rather strict requirments for this system: 3 sensors are situated on one surface, the distance ...
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0answers
41 views

How would you dampen this little quadcopter?

Well, I made a little quad from scratch. From scratch as in from PCB design. After assembling, testing, some coding, it turns out my accelerometers get WAY TOO MUCH vibrations and I can't detect ...
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42 views

compute Power Spectral Density from Accelerometer data

I have an accelerometer data i.e. AccX, AccY and AccZ. I am looking for an algorithm to compute Power Spectral Density from this data. I know the following: ...
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28 views

is any windows application available for accelerometer based computer mouse [migrated]

I want to make an AIR mouse using Arduino and accelerometer, for this i used USB to TTL converter i have done everything successfully but can anyone tell me how use it in computer. I mean i don't know ...
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1answer
37 views

how to connect the pins of accelerometer MMA7361 [closed]

i have an accelerometer modulw whose pins are 5v,3.3v,x,y,z,sleep,og-detect,g select,selftest. i have connect only 5v,x,y,z please tell me how to use other pins. In my connection it gives random ...
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3answers
33 views

How to get values in terms of G in STM32F3 Discovery board

I am working on STM32 F3 Discovery Board. I am accessing accelerometer of the board. While doing so I am getting values for X,Y and Z axes. But these values are some random numbers. I want the output ...
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3answers
73 views

What is the unit of accelerometer module output

I am on a project to track the human body motion in to a 3d design and animation software. I found that acccelerometers are used for these purposes. According to my project what I will need is the ...
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1answer
62 views

Noisy sensor on a prototyping board

I made a small prototyping board where accelerometer data is read into a microprocessor, showing the data from the accelerometer after it is sampled, gives a very noisy signal. (50 mv peaks) I had a ...
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1answer
66 views

How is an accelerometer initially calibrated?

Referring to a MEMS accelerometer, how is the laboratory, initial calibration being carried out? Is the gravitational acceleration involved as a reference, or is the actual analog data being ...
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31 views

Displacement using accelerometer using known constraints

I am looking to find out the amount of displacement (x,y,z) over a period of 3 seconds using an accelerometer, in this case, the ones found on the iPhone. The purpose is to attach the iPhone on the ...
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3answers
516 views

Functionality of Accelerometers

Is it possible to do a speedo meter with an accelerometer ? I am working with Arduino hardware.
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72 views

How can I convert ADXL335 acceleration data into displacement?

This is my first question on StackExchange. I am using ADXL335 3 axis accelerometer to measure wave elevation on a tank. The data I recieve from the sensor is acceleration. I need the displacement of ...
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1answer
46 views

Interpretation of the graph of accelerometer

I have plotted the raw values of my accelerometer in gnuplot, and the acceleration in the dimensions of x, y and z are as follows... The accelerometer sensor is in a steady position, my question ...
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1answer
89 views

how to calibrate ADXL345 accelerometer?

I have ADXL345 digital accelerometer by Analog Devices. I use Beaglebone ADXL345 library that exist here: http://inspire.logicsupply.com/2014/08/beaglebone-3-axis-accelerometer.html So I can read the ...
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1answer
152 views

MPU6050 DMP values read

I am using MPU6050 breakout board IMU along with ATtiny2313 microcontroller to get the accelerometer and gyroscope values from the IMU. Here's the question : I want to know what values are computer ...
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1answer
56 views

accelerometers vs gyroscopes

In terms of semiconductor integrated circuits, is there any difference between an accelerometer or a gyroscope? are they the same part? Can I get a IC recommendation for something with 3 axis?
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1answer
45 views

ADXL 335 Accelerometer incorrect Output. z and y axes always the same

I have an ADXL 335 Accelerometer. I'm checking its output voltage values using a multimeter and I'm consistently getting the z and y axes giving me the same result. How do I trouble shoot this ...
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2answers
88 views

Understanding use of accelerometers to measure angular (rotational?) accelerataion

Imagine this: A rod is attached at one end to a rotating shaft. So, as the shaft rotates from 0 to 90 degrees back-and-forth (in the xy plane), so does the rod. My goal is to measure the instantaneous ...
2
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1answer
351 views

Reading MPU-6050 with MSP430g2553 using I2C

I´ve been searching for libraries or documentations for helping me reading from and writing to the acell + gyro breakout MPU-6050 from InvenSense. I managed to read it with the arduino's libraries ...
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3answers
103 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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146 views

3-wire SPI Interface between Arduino (Teensy 3.1) and Accelerometer (ADXL344 or ADXL345)

I'm having problems in interfacing and receiving data from the Accelerometer (ADXL344) to my Arduino (Teensy 3.1). I have connected the pins as shown in the attached schematic. Furthermore, I have ...
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80 views

MPU6050 not coming out of sleep mode

I am using the accelerometer-gyroscope-temperature sensor ic MPU6050. When first powered ON, the sleep bit in the power_management_register_1 (bit6) has to be reset so as to start the working of the ...
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84 views

Collision direction using an accelerometer

I'm trying to determine the direction on a vehicle that a collision occurred. After some threshold value is met I've tried a couple of different approaches to determine which direction the collision ...
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25 views

What sensors to use to track posture devation?

After a cursory glance through google I could not find any information if such a thing is even possible. I believe that its not possible using something like a gyroscope or accelerometer due to the ...
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2answers
108 views

Is one accelerometer enough for detecting tilt/orientation of a rigid body?

I posted this question earlier in physics.stackexchange, but I think this is actually the best place for it. I’m not familiar with sensor hardware, and I don’t really know how an accelerometer works. ...
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1answer
205 views

Problem in reading accelerometer axis (ATMEGA328P + ADXL345)

I really need help with my project. I'm trying to connect ADXL345 with ATMEGA328P through SPI interface to send received data from Atmega328P to PC via UART interface. The ATMEGA328P is sending the ...
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1answer
273 views

ADXL345 Arduino UNO Activity Inactivity interrupt

I have DATA_READY, Activity and Inactivity interrupts mapped from INT1 to INT0 on the arduino. DATA_READY works fine, the problem is Activity and Inactivity are always set to 0 in the INT_SOURCE ...
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1answer
460 views

Understanding how to use an accelerometer to detect vehicle collisions

Objective: To use an accelerometer to detect where on a vehicle a crash occurred (e.g. impact occurred on the passenger side.). Parts: Arduino Uno and LSM3030DLHC accelerometer Background: I've been ...
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2answers
353 views

Accelerometer double integration error

I wanted to use an accelerometer or IMU to measure speed and displacement over a period of about 1 minute or 400m. From this answer I found at stackoverflow, the error propagates at a rate of \$t^2\$ ...
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1answer
257 views

ADXL345 Arduino UNO data_ready interrupt

I would like the sensor values to be updated each 10ms(100Hz) and then run the algorithm and repeat the same process. However, after timing the algorithm it is taking only 2ms, I think the data_ready ...
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1answer
150 views

Using an External interrupt from any pin PIC16F873A

I'm trying to use an interrupt, which will occur on a rising edge of a signal coming from my LSM303DLHC accelerometer. The accelerometer has a Data Ready (DRDY) signal that fires every time new data ...
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3answers
102 views

Accelerometer Impact/Shock

I am a complete novice when it comes to electrical engineering; however, I'm interested to know the capability of accelerometers. In addition to capturing data on distance traveled, etc. - is an ...
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1answer
67 views

ADXL 345 Noise Issue for my use case

I am building a solution where I want my MCU to wake up based on a trigger generated by accelerometer after detecting an activity. There are a number of samples available for this and I am able to ...
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55 views

Combine LED with accelerometer in small size for violin bow frog

The question was extended from the post: Violin bow position tracking with SMD LEDs and photoresistors. It is easier to understand the problem and the purpose here with the link, but I will elaborate ...
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10answers
2k views

Do accelerometers know when they are moving straight up or straight down?

I need a sensor that I can only place on top of an object, to count the number of times the object moves up and down. Would placing an accelerometer on top of the object accomplish this or can it ...
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1answer
96 views

Adding High Byte and Low Byte of LSM303DLHC Accelerometer Output

Interpreting LSM303DLHC Accelerometer Output Hi all, This is my first StackExchange question ever, so I will do my best to be specific and offer as much reference as possible. I'm currently ...
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1answer
56 views

Temperature sensor slope explanation

I am looking at an accelerometer(data sheet is BMA280 ) which has capabilities of measuring temperature from -40 to 85 degrees celsius. It also specifies a Temperature Sensor Slope of 0.5K/LSB, where ...
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1answer
136 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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2answers
88 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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108 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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4answers
98 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
49 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 ...
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2answers
271 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
126 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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349 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
396 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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1answer
183 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
247 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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1answer
2k 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
146 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 ...