Vernier Acceleration Sensor Python: Difference between revisions
From wikiluntti
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=== Introduction === | === Introduction === | ||
=== | === Sensor Class: Check the modes === | ||
Actually, the following codes assume that the color sensor is attached to the port 1. It should be "nxt-analog". | |||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
| Line 11: | Line 13: | ||
import time | import time | ||
import os | |||
os.system('setfont Lat15-TerminusBold32x16') # Try this larger font | |||
p = Sensor( INPUT_1 ) | p = Sensor( INPUT_1 ) | ||
| Line 17: | Line 21: | ||
time.sleep(5) | time.sleep(5) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Returns the following modes ' | Returns the following modes 'analog-0' and 'analog-1'. | ||
Or equivalently the following code works | |||
<syntaxhighlight lang="python"> | |||
from ev3dev2.sensor import * | |||
import time | |||
accSensor = Sensor(address="ev3-ports:in1") | |||
print( accSensor ) | |||
print( accSensor.modes ) | |||
#time.sleep(5) | |||
accSensor.mode="ANALOG-0" # | |||
#accSensor.mode="ANALOG-1" # | |||
#time.sleep(5) | |||
while 1: | |||
print(accSensor.value() ) | |||
</syntaxhighlight> | |||
The mode ''ANALOG-0'' and ''ANALOG-1'' differ by that that pin 5 is high for ''ANALOG-1'', see | |||
[http://docs.ev3dev.org/projects/lego-linux-drivers/en/ev3dev-jessie/sensor_data.html#nxt-analog-modes | nxt-analog modes]. | |||
=== | === Calibrating The Accelerometer === | ||
The Vernier accelerometer measures one dimensional acceleration. Thus, it is easy to calibrate by using Earth's gravitational acceleration, <math>g = 9.81 m/s^2</math>. | |||
<syntaxhighlight lang="python"> | |||
#!/usr/bin/env python3 | |||
# https://sites.google.com/site/ev3devpython/ | |||
from ev3dev2.sensor import * | |||
from ev3dev2.sensor import INPUT_1 | |||
import time | |||
import os | |||
os.system('setfont Lat15-TerminusBold32x16') # Try this larger font | |||
p = Sensor( INPUT_1 ) | |||
p.mode="ANALOG-1" | |||
while 1: | |||
acc = ( p.value(0)-2271)/73*9.81 | |||
print( acc ) | |||
time.sleep(1) | |||
#Down 2198 | |||
#-> Zero : 2198 + 146/2 = 2271 | |||
#Up 2344 | |||
</syntaxhighlight> | |||
Latest revision as of 20:20, 21 September 2020
Introduction
Sensor Class: Check the modes
Actually, the following codes assume that the color sensor is attached to the port 1. It should be "nxt-analog".
#!/usr/bin/env python3
# https://sites.google.com/site/ev3devpython/
from ev3dev2.sensor import *
from ev3dev2.sensor import INPUT_1
import time
import os
os.system('setfont Lat15-TerminusBold32x16') # Try this larger font
p = Sensor( INPUT_1 )
while 1:
print( p.modes )
time.sleep(5)
Returns the following modes 'analog-0' and 'analog-1'.
Or equivalently the following code works
from ev3dev2.sensor import *
import time
accSensor = Sensor(address="ev3-ports:in1")
print( accSensor )
print( accSensor.modes )
#time.sleep(5)
accSensor.mode="ANALOG-0" #
#accSensor.mode="ANALOG-1" #
#time.sleep(5)
while 1:
print(accSensor.value() )
The mode ANALOG-0 and ANALOG-1 differ by that that pin 5 is high for ANALOG-1, see | nxt-analog modes.
Calibrating The Accelerometer
The Vernier accelerometer measures one dimensional acceleration. Thus, it is easy to calibrate by using Earth's gravitational acceleration, .
#!/usr/bin/env python3
# https://sites.google.com/site/ev3devpython/
from ev3dev2.sensor import *
from ev3dev2.sensor import INPUT_1
import time
import os
os.system('setfont Lat15-TerminusBold32x16') # Try this larger font
p = Sensor( INPUT_1 )
p.mode="ANALOG-1"
while 1:
acc = ( p.value(0)-2271)/73*9.81
print( acc )
time.sleep(1)
#Down 2198
#-> Zero : 2198 + 146/2 = 2271
#Up 2344
