AnsweredAssumed Answered

Tilt angle measurement using accelerometer

Question asked by utpal on May 13, 2015
Latest reply on May 13, 2015 by NevadaMark

Hello friends,

 

Following are some of the basic questions I am facing while designing a tilt measurement unit.
Answers to these shall be highly appreciated.

 

Q1: What is the relation between various sensitivity units?

I have come across many units for defining accelerometer sensitivity.

mg/LSB

mV/degree

counts/g

%/g

mg/degree

Till now the best unit I can cope up with is mg/LSB as I can see the fixed minimum constant acceleration the chip can distinguish across any of its sensing axis.

 

Q2: Which Analog chip will be much suitable for following specifications?

  1. Angular measurement range:
    Option 1: +/- 180 deg
    Option 2: +/- 90 deg
  2. No. of axes: 2
  3. Angle measurement accuracy: 0.01 deg
  4. Output type: Digital (preferably)
  5. Operating voltage range: Not finalised yet
  6. Operating temperature range 0 degC to 80 degC

 

Q3. What is the correlation between accelerometer accuracy & sensitivity?

Suppose certain accelerometer is offering 0.1 mg/LSB sensitivity over +/- 2 g in every axis.

How to improve the measurement angle range for an accuracy of 0.01 deg?

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