Table of Contents
Advertisement
10.8.6 Configuring a frequency input
Bosch Motorsport
Linear phase – no signal distortion
10000Hz Abtastrate
2
1.5
Wert
1
0.5
0
-0.5
-1
-1.5
-2
0
500
1000
1500
2000
2500
3000
Abtastwerte (roh)
Sensor signal with noise
Latency compensation – no filter delay in recorded data
– Filtering is (smart) averaging over several samples
– Filtered signal is delayed with respect to real time signal
– C 60 filters have constant, frequency independent delay
– Delay (e.g. 22 samples at 10 ms) is corrected during recording
– No delay filtered vs. unfiltered in recorded data
– Correction is (of course) not possible for real time data (display, online, PWM out)
– Use filtered data for recording, use unfiltered data for real-time
This function requires the installation of Software Upgrade 2.
Example: measurement of wheel speed
– Pulse wheel attached to wheel
– Each passing tooth of pulse wheel triggers hall sensor
– Calculation of wheel speed with wheel circumference
1.
Click 'Measurement Sources' in the Toolbox.
2.
Expand the list of 'I/O Channels' by clicking on '+' in the C 60 Project Tree.
3.
Drag the 'Velocity' digital signal source from the Toolbox and drop it on the desired
'REV' input channel in the C 60 Project Tree.
4.
The 'Velocity Wizard' opens.
Data Logger C 60
Analog and Frequency Inputs | 10
100Hz Abtastrate
1.5
1
Wert
0.5
Recorded signal 100Hz
0
(unfiltered)
-0.5
-1
-1.5
0
5
10
15
20
25
30
Abtastwerte (dezimiert)
100Hz Abtastrate
1.5
1
Wert
0.5
Recorded signal 100Hz
0
(filtered)
-0.5
-1
-1.5
0
5
10
15
20
25
30
Abtastwerte (gefiltert)
63 / 108
Advertisement
Table of Contents
