Questions tagged [accelerometer]

A sensor to measure acceleration.

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3answers
84 views

How to measure tilt on a dynamic device?

I'm trying to instrument a vehicle component. I want to measure a component's angle during a drive cycle. The component has a single degree of freedom, it has a fixed axis. I'm trying to figure out ...
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2answers
59 views

Confusion about the meaning a parameter

Below is a part from this accelerometer: For +/-2g the Scale factor tolerance is given as 10mg. There is also 0.25%. This is in parentheses as 1.25(0.25%) V/g. Is 10mg derived from 1.25(0.25%) V/g? ...
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3answers
167 views

Accelerometer MMA8451 issue

We at my company, has a very strange issue regarding til MMA8451. We are experincing that our accelerometers data can be suddenly wrong over time. We have approximately 250 devices out, running in ...
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1answer
11k views

Rotating a gyroscope's output values into an earth-relative reference frame

For whatever reason, I seem to have gotten myself twisted into quite a confusion on how to process data from my 3 axis gyro and 3 axis accelerometer to get gyro rotation values related to the earth's ...
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2answers
156 views

3 axis accelerometer for detection of cutting a fence [closed]

I am currently working on a project and would appreciate your help. So i have this fence (eg. 3m x 3m) on which my 3 axis accelerometer is mounted in the geometrical center. It can detect whether ...
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4answers
609 views

Speed calculation using Accelerometer

I am using ST manufacture Accelerometer(LIS2DE12) and i making a small hobbyist project for me. For this I am using ST-Microcontroller and developing the C code i am using KEIL V5 IDE. Configured the ...
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1answer
643 views

Cannot read accelerometer values from MPU6050 Interfaced with STM32F303RE

I m working on a "self-balancing robot" with STM32F303RE.I m using STCubeMX to generate the MCU configuration code and then I added the main() to get the values from MPU6050 from the following code : ...
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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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2answers
101 views

can an acceleration sensor (smartphone) sense if someone is sitting in a train or just sitting normally?

can an acceleration sensor (smartphone) sense if someone is sitting on a train (or commuting in a car for example) or just sitting stationary? This may be a really basic question but thanks for your ...
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1answer
58 views

Using my sensor values, what are relevant data analysis techniques?

I am currently trying to devise a system using gyroscope+accelerometers placed in on a hat/cap in certain areas of the head (Front-left, Front-right, Centre, Back-left, Back-right). I want to create a ...
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1answer
1k views

Balancing quadcopter using mpu6050 [closed]

I am on a project which nearly completed. But what remains is balancing. My project is making a quadcopter. All the programing and hardware stuff is completed. But when i fly it, it doesnt goes up, it ...
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3answers
8k views

Small Wireless Gyroscope & Accelerometer

I'm looking to assemble a very small circuit to transmit data from a gyroscope and/or accelerometer to a computer via wi-fi. It also needs to be self-contained (so should contain a power source). The ...
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1answer
1k views

MPU6050 showing inconsistent angle values

I'm using this Arduino code to calibrate and read from an MPU6050 accel/gyro sensor from an Arduino Mega. The calibration and reading of values seemed to go well. However, I'm seeing some ...
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1answer
99 views

Are there any “Translation Accelerometer”?

I find many "Rotation Accelerometer" such as "GY-85", "GY-521", but no one for Translation. Are there any "Translation Accelerometer", can detect the XYZ axis movement?
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1answer
285 views

LSM6DS33 how to filter accelerometer values even more (< 50Hz)

I'm trying to use a LSM6DS33 6-axis accelerometer/gyro chip as an inertial navigation aid, participating in sensor fusion. The problem is that the application has large amount of vibrations and the ...
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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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3answers
158 views

Radiation Effects on Electronics

I'm developing a magnetic field sensing kit for a project. The kit contains sensors (specifically an accelerometer, a gyroscope, and a magnetometer) that will detect and measure magnetic fields, and ...
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3answers
197 views

How to detect the Accelerometer is moving

I am using the MCU intergrade 3-axis accelerometer and set it on the bicycle. I want to detect the bicycle is moving or stop. But the vibration noise let my function failed. Is anyone could share ...
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2answers
107 views

Optimal sensor for measuring object velocity in an open area?

I am trying to measure vertical and horizontal speed of an object attached to a parachute. It will be launched from a low altitude and in an open area, allowing satellite GPS lock. Data treatment ...
12
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2answers
21k views

How Precise can I get with Accelerometer and Gyroscope

I want to build a little project to track an objects position in space. For this I intend to use an accelerometer and a gyroscope. The problem is I want this tracking to be very precise, and I haven'...
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2answers
237 views

Tracking movement of limbs for smartphone app

I'm looking at building a smartphone app that will need to track the users limbs (say legs/feet) as accurately as possible. The goal is to trace the moments of body parts and the timing of the ...
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1answer
339 views

Realistic Magnetometer Specifications [closed]

I'm working on making improvements to an old project I helped design. The project used an Arduino to take measurements from six sensors to measure the strength of a nearby electromagnet that generated ...
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2answers
1k views

Converting Acceleration of ADXL335 data into displacement

I'm currently using a ADXL335 chip two measure acceleration then converting it into a displacement. I'm wanting to measure the vetical (-z direction) displacement range of maximum 10cm, so quite small....
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7answers
4k views

Acceleration when device is on tilt

I'm currently working on device that uses always-on 3D accelerometer(using scale +-2g) and 3D gyroscope(using scale +-250g) -sensor. I can read every possible vector (X,Y,Z) and their acceleration (g'...
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1answer
106 views

Measuring High Speed Angular Velocity 20,000+ rps

I'm looking for a way of measuring angular velocity in a spinning object at high speeds - up to 25,000 degrees per second. There's ridiculously expensive gyros in the market that can do this, but I'm ...
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3answers
584 views

LIS3DH- Understanding Z axis output

I am trying to measure a machine's vibration using LIS3DH sensor. I set the LIS3DH in low power mode and 5.376 kHz sampling frequency which outputs 8 bit output. I use SPI to get the data from the ...
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1answer
695 views

Measure vertical distance travelled

I wonder if it's usually practical to use an accelerometer to measure the height of a ball tossed in the air. That is, would it be accurate to integrate the acceleration measured over time twice? An ...
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1answer
125 views

Accelerometer readings

I'm using an Endevco Model 2220D Accelerometer with an Endevco Model 2721B Charge Amplifier to get vibration readings from a motor. I was asked to get a reading in IPS (Inches per second) but the ...
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1answer
197 views

Identifying component from i2c trace & obscure SMD marking

I wanted to poke around one of those sub-10$ smart bands, so I got a couple of them. I opened it and I was able to identify some major components from the SMD markings, including a Dialog DA14580 MCU, ...
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1answer
1k 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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1answer
45 views

Measuring electro-hydraulic drive's inertia

I have an electro-hydraulic drive – a hydraulic motor with coupled to it a synchronous generator. Also there is an encoder installed on the shaft of the generator. By using my DAQ unit I will measure ...
2
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1answer
530 views

Configuring IMU FIS1100

We have been working on motion sensor unit FIS1100. We decided to use it as traditional motion sensor (FIS1100 can be operated in two modes Attitude engine mode and traditional sensor mode). We are ...
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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,...
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2answers
92 views

What technology exists that could activate a small circuit upon high acceleration/impact?

The circuit will fit inside a 12 gauge shotgun shell, be fired from it (with less gunpowder), and will have DC batteries. I'm wanting to conserve battery life until the shot is fired. When fired, I ...
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2answers
95 views

How can I make an Arduino accelerometer?

I'm helping a friend with a physics high school project and we are thinking about doing some rockets fueled with chemicals and a chain reaction for launching. The general idea is: the first rocket ...
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2answers
968 views

How can I convert ADXL335 acceleration data into displacement?

I am using ADXL335 3 axis accelerometer to measure wave elevation on a tank. The data I receive from the sensor is acceleration. I need the displacement of the sensor in x,y and z direction with ...
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2answers
531 views

Detect movement in a very power efficient way

I am working on a device i can strap on to an expensive electronics instrument, and when someone moves the instrument, the device detects it and sends its position from a GPS to a server, via WiFi, ...
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1answer
153 views

MS5611 Barometer not working on PCB design

On a recent project of mine, I incorporated an MPU 9250 and a MS5611 Barometer on the i2c bus of an atmega 32u4. The MPU 9250 works perfectly, but as soon as I solder on the MS5611 neither of them ...
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3answers
840 views

Simulate Gyroscope through MEMS accelerometer

Is possible to simulate the Gyroscope using Accelerometer values? I would like to make that in Android Context so using MEMS smartphone accelerometer.
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5answers
444 views

accelerometer interference

I had a PCB containing a micro usb and a 3 axes accelerometer LIS3DH. I put the PCB at fixed position and the value of Z vary between --77at -83. but when I touch the usb cable with my hand or with a ...
3
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1answer
130 views

Finding an accelerometer

How do I go about finding/calculating the specifications of an accelerometer that can measure vibrations upto 2kHz and deflections upto 2mm? EDIT: After calculating and obtaining 16000g's worth of ...
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2answers
218 views

Is there a better filter or a modification to the Kalman filter that could take advantage of having all the data during the trajectory at once?

I am trying to reconstruct the trajectory of an object with an strapped down IMU on board to do dead reckoning. A Kalman filter seems to be in order. But the Kalman filter seems to be oriented toward ...
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1answer
37k 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
158 views

How to understand data from Bluetooth LE accelerometer with X,Y,Z as single value? [closed]

I'm using a cheap BLE accelerometer MPU 6050 that notifies X, Y, Z values as a single attribute. It seems that this type of value hasn't been standardized and I don't know how to read data correctly. ...
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0answers
628 views

What value pull up resistors does the MPU9250 use? [duplicate]

Looking at the datasheet On page 32, the datasheet says "The MPU-9250 always operates as a slave device when communicating to the system processor, which thus acts as the master. SDA and SCL lines ...
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2answers
96 views

ADXL354 V1P8ANA

I am using an ADXL354 in a circuit, and the part has a voltage output (V1.8ANA) that is the output of the internal LDO which can be used as a reference for an ADC. I am trying to find out whether I ...
5
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2answers
2k views

Does MEMS accelerometer stability deteriorate over time?

I am wondering if over time MEMS accelerometer produces any worse output than when it is new? I found this research paper which acknowledges that temperature affect sensor output but there are no ...
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1answer
1k views

refresh rate for gyroscop and accelerometer [ mpu6050 ]

What is refresh rate ( update rate) for gyroscop and accelerometer ? If you write in the register the following values in mpu6050 : SMPLRT_DIV --> 19 CONFIG --> 2 ( DLPF off )
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1answer
556 views

Cheap alternative to an accelerometer [closed]

I am designing a very simple device, which absolutely needs to be inexpensive, total BOM cost < $1.00 including the MCU (at 10k+ units). This device would benefit from knowing its orientation, ...

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