Questions tagged [accelerometer]

A sensor to measure acceleration.

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Should I be using a Standard Kalman Filter (KF) or an Extended Kalman Filter (EKF)?

So I am trying to implement a Kalman filter for an Inertial Measurement Unit (IMU) using an Arduino. I have 4 sensors: GPS Accelerometer Gyroscope Magnetometer To measure various vehicle properties ...
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629 views

Constant values read from LIS3DSH Accelerometer

I'm working with the board STM32F4DISCOVERY from ST microcontrollers. I'm trying to read acceleration on the 3 axes from the accelerometer LIS3DSH via I2C communication. The code is working on one ...
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155 views

Velocity from Acceleration [closed]

In geological instrumentation, it is frequent to find the "integration of the acceleration" measurement, as the "empirical estimate" of the velocity, namely, the Particle Point Velocity (PPV). ...
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252 views

3.3v output voltage on arduino mini

I'm learning to use the Adafruit LSM9DS0 and have cobbled this code together such that an LED will turn on when it detects motion on the accelerometer, specifically when the magnitude is over a ...
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227 views

Accelerometer - Offset correction

I'm using the MMA8453Q for motion detection. The accelerometer is mounted such a way that when it is stationary, X & Y axes are at 0g & Z-axis is at 1g. My usecase is: A tilt across any axes ...
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1answer
794 views

Calculating absolute roll/pitch/yaw angle of falling objects [duplicate]

I am wanting to build a device with gyro, accellero, gauss (compass) sensors and barometric sensor. This device will record all data from the sensors over a period of about 15 minutes where a person ...
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205 views

Is “transient detection” exclusive to Freescale?

I'd like to detect the dynamic component of acceleration, i.e. the change in acceleration, and generate an interrupt when such change is detected. I see that MMA8451/2/3 calls this "Transient ...
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196 views

MPU 6050 dspic33fj128gp802 addition operator problem

I use dspic33fj128gp802 and MPU6050 for my project. Microcontroller succesfully takes the data from sensors 6 channel and sends the data pc via UART. When i want to add "float 2.0" or "int 2" to ...
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1answer
627 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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384 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. ...
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Accelerometer on doors and windows

We have made a mistake. We created this pcb with accelerometer , a very good one (ADXL345) datasheet here and it sleeps ,and waking up on acceleration event. in our case we set it to almost the ...
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3answers
864 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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3k views

How to decrease the sensitivity of a sensor (accelerometer) [closed]

The accelerometer in this kit are very sensitive. Even a small touch changes the values very rapidly. I want to lower the sensitivity of the sensor. What is the way of doing this?
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90 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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2answers
166 views

acceleration output interpretation

I'm using LSM9DS1 accelerometer which I configured with 16g range. I left the device without movement and I got following accelerations x : 0 y : 0 z : 1300 the device is subjected only to ...
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231 views

What are the units of the measurements that come out of an accelerometer?

I'm pulling samples out of this accelerometer that I've configured for high resolution mode: and I'm trying to understand the units of what's coming out. Some places online seem to indicate just <...
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114 views

Acceleration calculation from ADC raw data

We have interfaced PCB393B12 accelerometer with MSP430F5438A board, by using 8-bit ADC. We receive raw data in 0-255 range with 0v to +2.5v as reference. How we can obtain corresponding ...
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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
4k views

How to compute acceleration from accelerometer raw data

I'm working on a project based on NXP accelerometer MMA8653. This is a I2C, 3-axial accelerometer with 10-bit resolution. Actually I can read the accelerometer registers and I'm able to configure it....
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2answers
330 views

Accelerometer sensitivity range

I'm looking at the KX023 and it seems to have a 64 counts/g sensitivity. Its datasheet specifies the following What I don't quite understand is why there're two sets of figures. The top set goes up ...
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2answers
5k 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 ...
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1answer
139 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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1answer
865 views

Accelerometer gives wrong values for stationary axes

I have a BMI160 IMU which gives a good reading for the axis parallel to gravity (1G or -1G), but a changing value of about 2G or -2G for the axes that should show 0G. This is true for all axes, I've ...
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2answers
362 views

What are the technical difficulties of making an accurate digital accelerometer?

In theory, double integrating accelerometer data with time should give displacement. However this is not widely practiced due to how susceptible accelerometer is to noise (and other reasons??), and ...
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5answers
423 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 ...
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3answers
723 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
327 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 is. ...
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1answer
353 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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839 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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3answers
16k views

Track 3D Position with an Accelerometer [closed]

I'm trying to build a piece of hardware with an accelerometer that could track the approximate 3D position of an object. The accelerometer would not be rotating, so a gyroscope shouldn't need to be ...
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1answer
21 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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1answer
95 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 ...
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3answers
76 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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1answer
555 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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2answers
102 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 ...
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3answers
825 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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112 views

ADXL345 generating interrupts without MCU

I wonder if it's possible to drive an ADXL345 without an MCU on the board. That is, to set the ADXL345 to generate an interrupt on activity without needed an MCU on board. Could the register values ...
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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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1answer
628 views

Does position error from accelerometer still build up quadratically when using Kalman filtering?

I want to implement an inertial navigation system that uses a basic IMU for indoor position tracking. From all the things I've read you need to assist the IMU with something like GPS or other means of ...
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1answer
1k 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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2answers
1k 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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1answer
130 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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1answer
253 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
423 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 ...
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4answers
2k views

What sensor to use for sensing azimuth & altitude of satellite dish?

Instead of using a motor encoder, what electronics sensor I could use to know the position of a satellite dish? In this case will be the Azimuth and Altitude of the dish (2-axis). Magnetometer, ...
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4answers
2k views

Converting two's complement hex values to binary?

I'm reading x-axis accelerometer data from an IC via the I2C bus using I2C-Tools ( specifically i2cget ) in Linux. Here is the code that is reading these values: <...
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1answer
293 views

Measuring rotation over z-axis (gravity axis) inside an metallic duct

Well from my first research from the web I wasn't able to tell if what I need can be done. The thing is, I need to measure the rotation over z-axis (yaw), in other words, to know the relative angle ...
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1answer
29 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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2answers
86 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) ...
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3answers
111 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/...